CBSE Class 10 Biology Life Processes MCQs Set I

Question: The mounting material used in the preparation of a leaf peel is
a) Water
b) Glycerine
c) Wax
d) None of these

Answer: B

Question: The transport of water to upper parts of the plants during night is due to
a) Root pressure
b) Transpiration
c) Translocation
d) Leaf pressure

Answer: A

Question: Roots of the plants absorb water from the soil through the process of
a) Diffusion
b) Transpiration
c) Osmosis
d) None of these

Answer: C

Question. Animals having two respiratory pigments :-
a) Serpula
b) Glycera
c) Nereis
d) All of above

Answer: A

Question. Educated people are becoming more and more conscious about their high blood pressure ; one of the reasons is that :-
a) one becomes over active
b) one's urine excretion increases
c) one's cardiac output increases
d) ultra filteration under abnormal high blood pressure may rupture capillary walls of the glomeruli, leading to kidney failure

Answer: D

Question. Paneth's cells are found in
a) Crypts of Lieberkuhn
b) Peyer's patches
c) Organ of Corti
d) Islets of Langerhans

Answer: A

Question: Chlorophyll is present in
a) Intrathylakoid space
b) Thylakoid membrane
c) Intermembrane space
d) Inner membrane of envelope

Answer: B

Question: While preparing good temporary mount of leaf peel to observe stomata, care should be taken to avoid
a) Adding glycerine to the slide
b) Staining the peel with safranin
c) Having air bubbles in the slide
d) Using water to wash the slide

Answer: C

Question:.Select the groups of organisms where food material is broken down outside the body and absorbed
a) Mushroom, green plants, amoeba
b) Yeast, mushroom, bread mould
c) Paramecium, amoeba, cuscuta
d) Cuscuta, lice, tapeworm

Answer: B

Question: A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicated that rice water contains
a) Complex proteins
b) Simple proteins
c) Fats
d) Starch

Answer: D

Question: Amoeba shows the following kind of nutrition
a) Autotrophic
b) Holozoic 
c) Saprotrophic
d) Parasitic

Answer: B

Question: Photosynthesis is a
a) Catabolic process
b) Parabolic process
c) Amphibolic process
d) Photochemical process

Answer: D

Question: The principal transpiring organ of a plant is
a) Root
b) Stem
c) Flower
d) Leaf

Answer: B

Question: Transpiration helps in
a) Temperature regulation
b) Maintaining upward movement of water
c) Wilting of leaves
d) Both a and b

Answer: D

Question. Gastric digestion takes place efficiently in
a) acidic medium
b) alkaline medium
c) neutral medium
d) highly alkaline medium

Answer: A

Question. Diastema is associated with
a) presence of certain teeth
b) absence of certain teeth
c) absence of tongue
d) presence of tongue

Answer: B

Question: A leaf is boiled in alcohol before using iodine for starch test in order to
a) Dissolve starch
b) Dissolve chlorophyll 
c) Soften the leaf
d) Make it react with iodine

Answer: B

Question: The solution added to the leaf after boiling it in alcohol and then washing it with water is
a) Benedict‘s solution
b) Brine solution
c) I M sucrose solution
d) Iodine solution 

Answer: D

Question: The organisms that absorbs nutrition with haustoria are
a) Carnivore
b) Herbivore
c) Parasite 
d) Saprophyte

Answer: C

Question: The food we eat gets converted into energy and stored in our body in the form of
a) Glucose
b) Glycogen
c) Glucagon
d) Starch

Answer: B

Question: The process of taking food in the body is called as
a) Ingestion
b) Assimilation
c) Absorption
d) Digestion

Answer: A

Question: An example for autotrophic nutrition
a) Green plants
b) Fungi
c) Bacteria
d) Humans

Answer: A

Question: Guard cells differ from epidermal cells in having
a) Vacuoles
b) Nucleus
c) Mitochondria
d) Chloroplasts

Answer: D

Question: Plant groups in which sunken stomata are generally found are
a) Mesophytes
b) Epiphytes
c) Xerophytes
d) Hydrophytes

Answer: C

Question. Which one of the following is the matching set of the gland and its secretion?
a) Pituitary gland-thyroxin
b) Salivary gland-amylase
c) Adrenal cortex-vasopressin
d) Islets of Langerhans-secretin

Answer: B

Question. In a villus, some of the glycerol and fatty acids are combined to form fats, coated with proteins, and then transported as chylomicrons to the
a) lacteal
b) capillaries
c) lumen of the small intestine
d) lumen of the large intestine

Answer: A

Question: The opening and closing of stomatal pore depends upon
a) Oxygen
b) Temperature
c) Water in guard cells
d) Concentration of CO2 in stomata

Answer: C

Question: Select the appropriate equation which shows the summary of photosynthesis
a) 6CO₂ + 12H₂O→ C₆H₁₂O6 + 6O₂ + 6H₂O
b) 6CO₂ + H₂O + Sunlight → C₆H₁₂O6 + O₂ + 6H₂O
c) 6CO₂ + 12H₂O + Chlorophyll + Sunlight → C ₆H₁₂O₆ + 6O₂ + 6H₂O
d) 6CO₂ + 12H₂O + Chlorophyll + Sunlight → C₆H₁₂O6 + 6CO₂ + 6H₂O

Answer: C

Question. Heart with single circulation is found in :-
a) Mammals and birds
b) Reptiles
c) Fishes and amphibians
d) Fishes only

Answer: D

Question. A bolus is
a) a mass of crushed food moistened with saliva
b) the semisolid material resulting from. partial digestion in the stomach
c) the milky emulsified fat absorbed from small intestine
d) indigestible materials that helps in movement and absorption

Answer: A

Question: Select the incorrect statement about the autotrophs
a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
b) They store carbohydrates in the form of starch
c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
d) They constitute the first trophic level 

Answer: C

Question: The internal (cellular) energy reserve in autotrophs is
a) Glycogen
b) Protein
c) Starch
d) Fatty acid

Answer: C

Question. Chief function of bile is
a) to digest fat by enzymatic action
b) to emulsify fat for digestion
c) to eliminate waste product
d) to regulate 'process of digestion

Answer: B

Question. Deficiency of protein in a child, in the age group of 1 to 3 years, causes :-
a) Marasmus
b) Dwarfism
c) Gigantism
d) Kwashiorkor

Answer: D

Question: The part of leaf commonly used for preparing the slide of stomata is
a) Leaf margin
b) Leaf apex
c) Leaf epidermis 
d) Leaf petiole

Answer: C

Question. Find out the correct sequence of enzymes, substrate and end product
a) peptidases-proteins-amino acids
b) peptidases-peptides-amino acids
c) trypsin-fats-amino acids
d) maltase-maltose-glucose & galactose

Answer: B

Question. Inactive enzyme precursors, such as pepsinogen for pepsin, are called
a) holoenzymes
b) actinases
c) zymogens
d) mucopolysaccharides

Answer: C

Question: Choose the event that does not occur in photosynthesis
a) Absorption of light energy by chlorophyll
b) Reduction of carbon dioxide to carbohydrates
c) Oxidation of carbon to carbon dioxide
d) Conversion of light energy to chemical energy

Answer: C

In the following question, a statement of Assertion
(A) is followed by a statement of Reason (R). Answer these questions by selecting appropriate option given below:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.

Question. Assertion (A): Raw materials needed for photosynthesis are carbon dioxide, water and minerals.
Reason (R): Nutrients provide energy to an organism.

Answer: B

Question. Assertion (A): Lipases help in emulsification of fats.
Reason (R): Lipases hydrolysis fats and oils.

Answer: D

Question. Assertion (A): In woody plants, gaseous exchange occurs through lenticels.
Reason (R): Lenticels are specialised cells found along with stomata on the stem of woody plants.

Answer: C

Question. Assertion (A): In humans, there is a complex respiratory system.
Reason (R): Human skin is impermeable to gases.

Answer: B

Question. Assertion (A): Translocation of sugar occurs through the phloem.
Reason (R): It is achieved by diffusion of sugars through phloem.

Answer: C