CUET Biology MCQs Unit III Biology and Human Welfare

CUET Biology Human Health and Disease MCQs

Question: Which of the following disease is confirmed by ‘widal test’?

a) Tuberculosis

b) Typhoid

c) Plague         

d) Tetanus

Answer : B

Question: Food poisoning is caused by

a) Entamoeba histolytica

b) Escherichia coli

c) Clostridium botulinum

d) Corynebacterium diphtheriae

Answer : C

Question: The organisms which cause diseases in plants and animals are called

a) Pathogens

b) Vectors

c) Insects

d) Worms

Answer : A

Question: Many diseases can be diagnosed by observing the symptoms in the patient. Which group of symptoms are indicative of pneumonia?

a) Difficulty in respiration, fever, chills, cough, headache

b) Constipation, abdominal pain, cramps, blood clots

c) Nasal congestion and discharge, cough, sorethroat, headache

d) High fever, weakness, stomach pain, loss of appetite and constipation

Answer : A

Question: AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?

a) Shaking hands with infected persons

b) Sexual contact with infected persons

c) Transfusion of contaminated blood

d) Sharing the infected needles

Answer : A

Question: Cells involved in immune mechanism are 

a) erythrocytes 

b) lymphocytes

c) eosinophils

d) thrombocytes

Answer : B

Question: Retroviruses are implicated as a cause for cancer in humans because they 

a) carry gene for reverse transcriptase

b) may carry cellular protooncogenes in their genome

c) may carry v-oncogenes in their genome

d) carry single stranded RNA as their genetic material

Answer : D

Question: Botulism caused by Clostridium botulinum affects the 

a) spleen

b) intestine

c) lymph glands

d) neuromuscular junction

Answer : D

Question: Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit mutliplication of viruses are called 

a) immunoglobulins 

b) interferons

c) antitoxins

d) lipoproteins

Answer : B

Question: Salmonella is related with 

a) typhoid 

b) polio

c) TB

d) tetanus

Answer : A

Question: Christmas disease is another name for 

a) Down’s syndrome

b) sleeping sickness

c) haemophilia-B

d) hepatitis-B

Answer : C

Question: Which of the following is not a hereditary disease ? 

a) Cretinism 

b) Cystic fibrosis

c) Thalassaemia

d) Haemophilia

Answer : A

Question: Both sickle cell anaemia and Huntington’s chorea are 

a) bacteria-related diseases

b) congenital disorders

c) pollutant-induced disorders

d) virus-related diseases

Answer : B

Question: To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong? 

a) cytokine barriers

b) cellular barriers

c) physiological barriers

d) physical barriers

Answer : C

Question: In which of the following disease, there is always a time lag between the infection and appearance of the symptoms of that particular disease?

a) AIDS

b) Allergy

c) Cancer

d) Alcoholism

Answer : A

Question: Which one of the following acts as a physiological barrier to the entry of micro organisms in human body?

a) Skin

b) Epithelium of urogenital tract

c) Tears

d) monocytes

Answer : C

Question: Which of the following glands is large sized at birth but reducies in size with aging?

a) Thymus

b) Pituitary

c) Pineal

d) Thyroid

Answer : A

Question: Elephantiasis is caused by

a) Filarial worms

b) Flatworms

c) Tapeworms

d) None of these

Answer : A

Question: The toxic substance, ‘haemozoin’, related to the high fever and chill, is released during which of the following disease?

a) Dengue    

b) Malaria

c) Diphtheria

d) Phenumonia

Answer : B

Question: Vector for kala azar is:

a) sandfly

b) bedbug

c) louse  

d) housefly

Answer : A

Question: The chemical test that is used for diagnosis of typhoid is:

a) Widal-Test

b) PCR - Test

c) ESR - Test

d) ELISA-Test

Answer : A

Question: Ascaris lumbricoides is a species of parasitic roundworm that lives in

a) Humans

b) Grasshoppers

c) Pigs

d) None of the above

Answer : A

Question: Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues/organs by the patient. Which type of immune response is responsible for such rejections?

a) cell-mediated immune response

b) physiological immune response

c) humoral immune response

d) auto-immune response

Answer : A

Question: The long-term prospects for a truly human civilization depend in a large measure on

a) the ability of humanity to moderate its fecundity

b) increasing the food production

c) colonization of underpopulated areas

d) control of human diseases

Answer : D

Question: If a person shows production of interferons in his body, the chances are that he has got an infection of

a) typhoid 

b) measles

c) tetanus

d) malaria

Answer : B

Question: Hybridoma cells are 

a) product of spore formation in bacteria

b) hybrid cells resulting from myeloma cells

c) nervous cells of frog

d) only cells having oncogenes

Answer : B

Question: Which of these is most infectious disease?

a) Hepatitis-B 

b) AIDS

c) Cough and cold

d) Malaria

Answer : A

Question: Carcinoma refers to 

a) malignant tumours of the colon

b) benign tumours of the connective tissue

c) malignant tumours of the connective tissue

d) malignant tumours of the skin or mucous membrane

Answer : D

Question: Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness ? 

a) Valium 

b) Morphine

c) Hashish

d) Amphetamines

Answer : A

Question: If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence ? 

a) Serum albumins

b) Serum globulins

c) Fibrinogen in the plasma

d) Haemocytes

Answer : B

Question: Black water fever is a severe complication of

a) Plasmodium falciparum

b) P. vivax

c) P. malariae

d) all of the above

Answer : A

Question: To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

a) Physical barriers

b) Cytokine barriers

c) Cellular barriers

d) Physiological barriers

Answer : D

Question: One of the following is not the causal organism for ringworm

a) Macrosporum

b) Epidermophyton

c) Trichophyton

d) Microsporum

Answer : A

Question: Amoebiasis is caused by

a) Plasmodium vivax

b) Entamoeba gingivalis

c) Trypanosoma gambiense

d) Entamoeba histolytica

Answer : D

Question: The term 'Health' is defined in many ways. The most accurate definition of the health would be

a) health is a state of complete physical, mental and social well-being

b) health is the symbol of economic prosperity

c) health is the reflection of a smiling face

d) health is the state of body and mind in a balanced condition

Answer : A

Question: 'Smack' is a drug obtained from the:

a) latex of Papaver somniferum

b) leaves of Cannabis sativa

c) flowers of Dhatura

d) fruits of Erythroxyl coca

Answer : A

Question: Hypersensitivity to an allergen is associated with 

a) aberrant functioning of the immune mechanism

b) increase in ambient temperature

c) age of the individual

d) food habits

Answer : A

Question: Which one of the following is correct match?

a) Reserpine — Tranquiliser

b) Cocaine — Opiatic narcotic

c) Morphine — Hallucinogenic

d) Bhang — Analgesic

Answer : A
 

CUET Biology Respiration MCQs

Question. During hibernation frog performs

(a) Pulmonary respiration

(b) Cutaneous respiration

(c) Bucco-pharyngeal respiration

(d) Both cutaneous and pulmonary respiration

Answer : B

Question. In crustacea respiration occurs through

(a) Tracheae

(b) Gills

(c) Book lungs

(d) Book gills

Answer : B

Question. Respiratory organs in scorpion are:

(a) Gills

(b) Booklungs

(c) Skin

(d) Bookgills

Answer : B

Question. Numbers of lobes in right and left lungs of human are :

(a) 2, 4

(b) 3, 2

(c) 4, 2

(d) 6, 3

Answer : B

Question. The movement of true vocal cords in man is controlled by cartilages :

(a) arytenoids

(b) cricoid

(c) thyroid

(d) both (a) and (b)

Answer : A

Question. Adam’s Apple corresponds to

(a) Epiglottis

(b) Trachea

(c) Larynx

(d) Thyroid

Answer : C

Question. Trachea is lined with incomplete rings of

(a) Fibrous cartilage

(b) Calcified cartilage

(c) Elastic cartilage

(d) Hyaline cartilage

Answer : D

Question. Sites of gaseous exchange in lungs are:

(a) tracheioles

(b) alveoli

(c) bronchioles

(d) pulmonary chambers

Answer : B

Question. The process of respiration is concerned with

(a) Intake of O₂

(b) Liberation of O₂

(c) Liberation of CO₂

(d) Liberation of energy

Answer : D

Question. In expiration, diaphragm becomes

(a) Flattened

(b) Relaxed

(c) Straightened

(d) Arched

Answer : B

Question. Vital capacity of lungs is

(a) 500 ml

(b) 3.5 – 4.5 L

(c) 2.5 – 3.9 L

(d) 1.5 – 2.5 L

Answer : B

Question. Residual air mostly occurs in

(a) Alveoli

(b) Bronchus

(c) Nostrils

(d) Trachea

Answer : A

Question. Volume of air remaining in lungs after maximal expiratory effort is :

(a) Vital capacity

(b) Total lung capacity

(c) Tidal volume

(d) Residual volume

Answer : D

Question. human beings, CO₂ concentration in the inspired and expired air is respectively

(a) 0·03% and 5·3%

(b) 0·4% and 5·0%

(c) 0·04% and 3·0%

(d) 0·03% and 4·0%

Answer : D

Question. Bicarbonate ion is produced inside

(a) Lymphocytes

(b) Erythrocytes

(c) Neutrophils

(d) Basophils

Answer : B

Question. Dissociation curve is connected with

(a) Carbonic anhydrase

(b) Carbon dioxide

(c) Oxygen

(d) Oxyhaemoglobin

Answer : D

Question. Maximum amount 70-75% of carbon dioxide transport occurs as

(a) Dissolved in plasma

(b) Carbaminohaemoglobin complex

(c) Bicarbonate

(d) None of the above

Answer : C

Question. One molecule of haemoglobin carries

(a) One molecule of O₂

(b) Two molecules of O₂

(c) Three molecules of O₂

(d) Four molecules of O₂

Answer : D

Question. Oxygen carrier or the respiratory pigment in the blood of frog and other vertebrates is :

(a) Haemocyanin

(b) Cytochrome

(c) Haemoglobin

(d) None of these

Answer : C

Question. Amount of O₂ normally carried by 100 mL of pure blood :

(a) 10 rnL

(b) 20 mL

(c) 30 mL

(d) 40 mL

Answer : B

Question. The percentage of O₂ in inhaled air is about :

(a) 21%

(b) 16%

(c) 79%

(d) 4%

Answer : A

Question. Diffusion of oxygen in tissues of Cockroach occurs through

(a) Blood

(b) Integument

(c) Tracheae

(d) Tracheoles

Answer : D

Question. Which one of these statements is correct?

(a) all animals require a medium for cellular respiration

(b) in all animals oxygen is transported by blood

(c) all animals take oxygen from water or air through gills of lungs

(d) all animals need oxygen for respiration

Answer : A

Question. Epithelium lining bronchioles is

(a) Pseudostratified columnar

(b) Pseudostratified sensory

(c) Squamous scnsory

(d) Cuboidal and columnar

Answer : D

Question. Mammalian lungs contain an enormous number of minute alveoli. This is to allow :

(a) more space for increasing the total volume of inspired air

(b) more surface area for diffusion of gases

(c) more spongy texture for keeping lungs in proper shape

(d) more nerve supply to keep, the organs working more efficiently

Answer : B

Question. Diaphragm present in mammals is

(a) Membrane between external and middle ear

(b) Membrane around the brain

(c) Partition between the thoracic and abdominal cavities

(d) Membrane around lungs

Answer : C

Question. Intercostal muscles are found attached with :

(a) pelvic cavity

(b) ribs

(c) space between fingers

(d) digits

Answer : B

Question. The structure which does not contribute to the breathing movements in mammals is :

(a) Larynx

(b) Ribs

(c) Diaphragm

(d) Intercostal muscles

Answer : A

Question. Vital capacity of lungs of an average human is

(a) 3000-4500 ml

(b) 1500-.1800 ml

(c) 2000-2500 ml

(d) 500-1000 ml

Answer : A

Question. Volume of air inspired and expired in each breath in normal respiration by man is called :

(a) Tidal volume

(b) Total lung capacity

(d) Inspiratory capacity

(d) Residual volume

Answer : A

Question. During one circuit of blood from lungs to the tissue and back through the circulatory system the percentage of haemoglobin giving the oxygen is

(a) 50%

(b) 25%

(c) 75%

(d) 100%

Answer : B

Question. Hamburger's phenomenon is also known as

(a) HCO–₃ shift

(b) Na+ shift

(c) H+ shift

(d) Chloride shift

Answer : D

Question. Percentage of oxygen transported by haemoglobin is

(a) 97%

(b) 100%

(c) 49%

(d) 3%

Answer : A

Question. The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen to the tissues, because:

(a) The tissue can absorb O₂ from oxyhaemoglobin

(b) O₂ concentration in tissues is lower and CO₂ concentration higher than in lungs

(c) O₂ concentration in tissues is higher and CO₂ concentration lower than in lungs

(d) Oxyhaemoglobin undergoes reduction

Answer : B

Question. Haemoglobin-oxygen dissociation curve is :

(a) Hyperbolic

(b) Sigmoid

(c) Straight

(d) Constant

Answer : B

Question. Fish brought out of water dies because of

(a) Absence of pressure

(b) Inability to respire

(c) Inability to feed

(d) Rise in temperature

Answer : B
 

CUET Biology Microbes in Human Welfare MCQs

Question :  The technology of biogas production from cow dung was developed in India largely due to the efforts of

a) Indian Agricultural Research Institute and Khadi & Village Industries Commission

b) Indian Oil Corporation

c) Oil and Natural Gas Commission

d) Gas Authority of India

Answer : A

Question :  Which of the following microbes are used for the commercial production of citric acid?

a) Aspergillus

b) Asparagus

c) Asparagine

d) All of these

Answer : A

Question :  Wastewater treatment generates a large quantity of sludge, which can be treated by

a) oxidation pond

b) chemicals

c) digesters

d) activated sludge

Answer : A

Question :  BOD of waste water is estimated by measuring the amount of

a) oxygen consumption

b) oxygen evolution

c) biodegradable organic matter

d) total organic matter

Answer : A

Question. ‘Roquefort cheese’ is ripened by using a

(a) bacterium

(b) yeast

(c) cyanobacteria

(d) fungus.

Answer : D

Question. Select the correct group of biocontrol agents.

(a) Nostoc, Azospirillum, Nucleopolyhedrovirus

(b) Bacillus thuringiensis, Tobacco mosaic virus, Aphids

(c) Trichoderma, Baculovirus, Bacillus thuringiensis

(d) Oscillatoria, Rhizobium, Trichoderma

Answer : C

Question. The domestic sewage in large cities

(a) has a high BOD as it contains both aerobic and anaerobic bacteria

(b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)

(c) when treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

(d) has very high amount of suspended solids and dissolved salts.

Answer : B

Question. In gobar gas, the maximum amount is that of

(a) butane

(b) methane

(c) propane

(d) carbon dioxide.

Answer : B

Question. A biocontrol agent to be a part of an integrated pest management should be

(a) species-specific and symbiotic

(b) free living and broad spectrum

(c) narrow spectrum and symbiotic

(d) species-specific and inactive on non-target organisms.

Answer : D

Question : The bacterium that commonly lives in animal and human intestine is

(a) Bacillus anthracis

(b) Vibrio cholerae

(c) Escherichia coli   

(d) Corynebacterium

Answer : C

Question : Saccharomyces cerevisiae is employed in production of

(a) idli

(b) beer

(c) bread

(d) all of these

Answer : D

Question : Glucose fermentation by yeast yields

a) ethanol + CO₂  

b) ethanol + H₂O

c) methanol + CO₂ d) H₂O + CO₂

Answer : A

Question : Statins are obtained from

a) Streptococcus          

b) Mucor javanicus

c) Monascus purpureus

d) Clostridium butyricum

Answer : C

Question :  Big holes in Swiss cheese are made by a

a) a bacterium producing a large amount of carbon dioxide

b) a fungus that releases a lot of gases during its metabolic activities

c) a bacterium that produces methane gas

d) a machine

Answer : A

Question :  Antibiotics are the most effective on

a) Bacteria

b) Virus

c) Fungi

d) None of the these

Answer : A

Question : Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for mixing in petrol?

a) 2.5%

b) 10-15% 

c) 10%

d) 5%

Answer : D

Question : The guts of cow and buffalo possess:

a) Chlorella spp

b) Methanogens

c) Cyanobacteria

d) Fucus spp.

Answer : B

Question :  What would happen if oxygen availability to activated sludge flocs is reduced?

a) The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs

b) Flocs would increase in size as anaerobic bacteria would grow around flocs

c) Protozoa would grow in large numbers

d) It will slow down the rate of degradation of organic matter

Answer : A

Question :  Which of the following is mainly produced by the activity of aerobic bacteria on sewage

a) March gas

b) Laughing gas

c) Mustard gas

d) Propane

Answer : A

Question :  The primary treatment of waste water involves the removal of

a) stable particles

b) toxic substances

c) harmful bacteria

d) dissolved impurities

Answer : A

Question. The puffed-up appearance of dough is due to fermentation by bacteria. Identify the gas liberated during the process.

(a) Hydrogen sulphide

(b) Methane

(c) Ammonia

(d) Carbon dioxide

Answer : D

Question. What gases are produced in anaerobic sludge digesters?

(a) Methane and CO₂ only

(b) Methane, Hydrogen sulphide and CO₂

(c) Methane, Hydrogen sulphide and O₂

(d) Hydrogen sulphide and CO₂

Answer : B

Question. Which of the following can be used as a biocontrol agent in the treatment of plant disease?

(a) Lactobacillus

(b) Trichoderma

(c) Chlorella

(d) Anabaena

Answer : B

Question : Lactic acid bacteria convert milk into curd and improves its nutritional quality by enhancing

(a) vitamin A   

(b) vitamin B

(c) vitamin C   

(d) vitamin D

Answer : B

Question : Which one of the following is used in the manufacture of alcohol ?

(a) Bacteria          

(b) Bread molds

(c) Yeastsans

(d) Slime molds

Answer : A

Question : Monascus purpureus is a yeast used commercially in the production of

a) ethanol

b) streptokinase for removing clots from the blood vessels

c) citric acid

d) blood cholesterol lowering statins

Answer : D

Question :  Activated sludge should have the ability to settle quickly so that it can

a) be rapidly pumped back from sedimentation tank to aeration tank

b) absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank

c) be discarded and anaerobically digested

d) absorb colloidal organic matter.

Answer : A

Question : Yeast (Saccharomyces cerevisiae) is used in the industrial production of 

a) butanal

b) citric acid

c) tetracyclin

d) ethanol

Answer : D

Question :  Which one of the following is not a nitrogen-fixing organism?

a) Pseudomonas

b) Azotobacter

c) Nostoc

d) Anabaena

Answer : A

Question :  Which one of the following alcoholic drinks is produced without distillation?

a) Wine

b) Whisky

c) Rum

d) Brandy

Answer : A

Question. Which of the following in sewage treatment removes suspended solids?

(a) Secondary treatment

(b) Primary treatment

(c) Sludge treatment

(d) Tertiary treatment

Answer : B

Question. The microbial biocontrol agent for butterfly caterpillar is

(a) Bacillus thuringiensis

(b) Saccharomyces

(c) Lactobacillus

(d) Cyanobacteria

Answer : A

Question : In cheese microorganisms are required for

(a) ripening only

(b) souring of milk only

(c) souring and ripening

(d) development of resistance to spoilage

Answer : C

Question : Cyclosporin A is used for

a) dissolving blood clots

b) lowering cholesterol level

c) immunosuppression

d) enhancing tenderness of meat

Answer : C

Question :  Methanogens do not produce

a) oxygen

b) methane

c) hydrogen sulfide

d) carbon dioxide

Answer : A

Question : What gases are produced in anaerobic sludge digesters? 

a) Methane and CO₂ only

b) Methane, hydrogen sulphide and CO₂

c) Methane, hydrogen sulphide and O₂

d) Hydrogen sulphide and CO₂

Answer : B
 

CUET Biology Strategies for Enhancement in Food Production MCQs

Question : India and China have more than 70% of world livestock population and produce the following percentage of world farm.

a) 10 %

b) 25 %

c) 40 %

d) 50 %

Answer : B

Question : A branch of science that deals with the maintenance of hives of honeybees for the production of honey is called

a) aquaculture

b) pisciculture

c) apiculture   

d) sericulture

Answer : C

Question :  Which one of the following is not a fungal disease?

a) Black rot of crucifers

b) Smut of Bajra

c) Rust of wheat

d) Red rot of sugarcane

Answer : A

Question :  Fungicides and antibiotics are chemicals that

a) kill pathogenic fungi and bacteria, respectively

b) enhance yield and disease resistance

c) kill all pathogenic microbes

d) kill pathogenic bacteria and fungi respectively

Answer : A

Question :  Pisciculture is rearing and production of

a) Fishes

b) Birds

c) Reptiles

d) Reptiles

Answer : A

Question :  The silk worm silk is the product of  

a) cuticle of the larva

b) cuticle of the adult

c) salivary gland of the larva

d) salivary gland of the adult

Answer : C

Question :  The reason why vegetatively reproducing crop plants are best suited for maintaining hybrid vigour is that                           

a) they can be easily propagated

b) they have a longer life span

c) they are more resistant to disease

d) once a desired hybrid is produced, there are no chances of losing it

Answer : D

Question :  India’s wheat yield revolution in the 1960s was possible primarily due to          

a) hybrid seeds

b) increased chlorophyll content

c) mutations resulting in plant height reduction

d) quantitative trait mutations

Answer : C

Question :  Crop plants grown in monoculture are 

a) low in yield

b) free from intraspecific competition

c) characterized by poor root system

d) highly prone to pests

Answer : D

Question : The new varieties of plants are produced by

a) selection and hybridization.

b) mutation and selection.

c) introduction and mutation.

d) selection and introduction.

Answer : A

Question : Which one of the following technique is used for the manipulation of plant species in order to create desired plant types that are better suited for cultivation and give better yields and are disease resistant?

a) Out-breeding   

b) Out-crossing

c) Cross-breeding

d) Plant breeding

Answer : D

Question :  An explant is:

a) part of the plant used in tissue culture

b) part of the plant that expresses a specific gene

c) part of the plant

d) dead plant

Answer : A

Question :  Cod liver oil is rich in

a) Cod liver oil is rich in

b) K vitamin

c) C vitamin

d) None of these

Answer : A

Question :  Which one of the following products of apiculture is used in cosmetics and polishes

a) wax

b) Royal jelly

c) honey

d) oil

Answer : A

Question : Inbreeding depression

a) usually increases fertility only.

b) usually reduces productivity only.

c) usually reduces fertility and productivity.

d) usually increases fertility and productivity.

Answer : C

Question : Which one of the following is a freshwater fish?

a) Catla             

b) Rohu

c) Common carp

d) All of these

Answer : D

Question :  Which of the following is not used for crop improvement?

a) Introduction

b) Hybridization

c) Mutations

d) Inbreeding

Answer : A

Question :  Identify the edible fresh water teleost

a) Catla catla

b) Hilsa ilisha

c) Rays and skates

d) None of these

Answer : A

Question :  The alkaloid ajmalicine is obtained from

a) Atropa               

b)  Papaver

c) Curcuma           

d) Sarpgandha

Answer : D

Question :  The term aquaculture means                     

a) aspergillosis

b) inland fisheries

c) marine fisheries

d) Both b) and c)

Answer : D

Question :  The world’s highly prized wool yielding ‘Pashmina’ breed is                                 

a) sheep

b) goat

c) goat-sheep cross

d) Kashmiri sheep-Afghan sheep cross

Answer : B

Question :  Which one of the following pair of organ- isms are exotic species introduced in India ? 

a) Ficus religiosa, Lantana camara

b)  Lantana camara, Water hyacinth

c)  Water hyacinth, Prosopis cinereria

d) Nile perch, Ficus religiosa

Answer : C

Question : Which of the following is generally used for induced mutagenesis in crop plants?

a) X-rays                                  

b) UV (260 nm) radiations

c) Gamma rays (from cobalt 60)

d) Alpha particles

Answer : C

Question :  Lysine and tryptophan are

a) essential amino acids

b) aromatic and no acids

c) non-essential amino acids

d) proteins

Answer : A

Question :  To isolate protoplast, one needs

a) both pectinase and cellulase

b) chitinase.

c) cellulase

d) pectinase

Answer : A

Question : The 'mule' is the result of

a) inbreeding depression

b) out-breeding

c) cross-breeding

d) inter-specific hybridization

Answer : D

Question :  In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because

a) the cell division of meristems are faster than the rate of viral multiplication

b) Viruses cannot multiply within meristem cell (s).

c) meristems have anti viral compounds

d) the dividing cells are virus resistant

Answer : A

Question :  Grains of major cereals and millets lack amino acids

a) Lysine and tryptophan

b) Tryptophan and cysteine

c) Tryptophan and cysteine

d) Tryptophan and cysteine

Answer : A

Question :  The earliest animal to have been domesti- cated by man was most likely the           

a) horse                  

b)  cow

c) dog                      

d) pig

Answer : C

Question :  Which plant will loss its economic value, if its fruits are produced by induced partheno- carpy ?

a) Grape                 

b)  Pomegranate

c) Orange               

d) Banana

Answer : B

Question :  Which of the following crops have been brought to India from New world ?   

a) Cashewnut, potato, rubber

b) Mango, tea

c) Tea, rubber, mango

d) Coffee

Answer : A

Question :  Triticale, the first man-made cereal crop, has been obtained by crossing wheat with 

a) rye

b) pearl millet

c) sugarcane

d)  barley

Answer : A

Question : Which of the following processes is used for creating genetic variation by changing the base sequence within genes resulting in the creation of a new character or trait not found in the parental type?

a) Selection

b) Hybridization

c) Mutation

d) Breeding

Answer : C

Question :  Micro-propagation is

a) propagation of plants in vitro

b) propagation of microbes in vitro

c) propagation of cells in vitro

d) growing plants on smaller scale

Answer : A

Question :  More than 70 per cent of livestock population is in

a) India and China

b) China

c) India

d) Denmark

Answer : A

Question : Which one of the following is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Marino rams?

a) Hisardale

b) White Leghorn

c) Assel      

d) Langshan

Answer : A

Question :  Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of

a) early yielding rice variety

b) better irrigation facilities

c) shorter rice plant

d) disease resistant rice variety

Answer : A

Question : In crop improvement programme, haploids are important because they        

a) require one half of nutrients

b) are helpful in study of meiosis

c) grow better under adverse conditions

d) form perfect homozygous

Answer : D

Question :  High milk yielding varieties of cows are ob- tained by     

a) super ovulation

b) artificial insemination

c) use of surrogate mother

d) All of the above

Answer : D

Question :  The name of Norman Borlaug is associated with             

a) Green revolution

b) Yellow revolution

c) White revolution

d) Blue revolution

Answer : A