CBSE Class 10 Biology Life Processes MCQs Set H

Question:Energy rich foods are
a) Carbohydrates and fats
b) Proteins and mineral salts
c) Vitamins and minerals
d) Water and roughage

Answer: A

Question: Life process that converts chemical energy into heat energy
a) Nutrition
b) Respiration
c) Digestion
d) Excretion

Answer: B

Question: The force of water absorption affected by opening and closing of stomata is
a) Root pressure
b) Transpiration pull
c) Both of these
d) None of these

Answer: B

Question: Opening of stomata is influenced more by
a) Red light
b) Green light
c) Indigo light
d) Blue light 

Answer: D

Question. Saliva has the enzyme
a) pepsin
b) ptyalin
c) trypsin
d) rennin

Answer: B

Question. Goitre is caused due to deficiency of :-
a) Calcium
b) Iodine
c) Fluorine
d) Phosphorus

Answer: B

Question. Kidney is an excretory and regulatory organ. Which two of the following are regulated effectively by kidneys?
a) CO₂ and protein
b) Sugar and O₂
c) Water and salts
d) Water and fat

Answer: C

Question: Given below are the steps to be followed for performing starch test on a green leaf
(i) Boil the leaf in alcohol
(ii) Boil the leaf in water
(iii) Dip the leaf in iodine solution
(iv) Wash the leaf in water
The correct sequences of steps are
a) (i), (iv), (ii), (iii
b) (ii), (iv), (i), (iii)
c) (ii), (i), (iv), (iii)
d) (iv), (i), (ii), (iii)

Answer: D

Question: In order to de-starch the leaves for an experiment to show that sunlight is necessary for photosynthesis
a) Leaves are kept in alcohol and boiled in a water bath
b) Leaves are soaked in iodine for two hours
c) Plant with the leaves is kept in a dark room for 24 hours
d) Plant with the leaves exposed to light of a lamp, a night before the experiment

Answer: C

Question: Photosynthetic cells contain
a) Chlorophylls
b) Carotenoids
c) Xanthophylls
d) All of these

Answer: D

Question:Materials like sucrose are transported into phloem by using energy from
a) ATP
b) NADP
c) ADP
d) Carbohydrates

Answer: A

Question: The mode of nutrition found in fungi is
a) Saprotrophic nutrition 
b) Parasitic nutrition
c) Holozoic nutrition
d) Autrotrophic nutrition

Answer: A

Question: Pick out the incorrect statement
a) Organisms grow with time
b) Organisms must repair and maintain their structure
c) Movement of molecules does not take place among cells 
d) Energy is essential for life processes 

Answer: C

Question: Transpiration occurs from
a) Stomata
b) Cuticle
c) Both of these
d) None of these

Answer: C

Question: Woody plants carry gaseous exchange through
a) Root hair
b) Stem hair
c) Lenticels
d) Epidermal cells

Answer: C

Question: Xerophytes have drought tolerance as compared to mesophytes because of
a) Thick cuticle
b) Sunken stomata
c) Very less transpiration
d) d) All of these

Answer: D

Question: A student wanted to decolourise a leaf. He should boil the leaf in
a) Alcohol
b) Water
c) KOH solution
d) Glycerine

Answer: A

Question: Photosynthesis takes place in the presence of
a) Water and sunlight
b) Oxygen and sunlight
c) CO₂, water and sunlight
d) CO₂ and O₂

Answer: C

Question: The green colour of plants is due to the presence of
a) Chlorophyll
b) Carotene
c) Xanthophyll
d) Starch

Answer: A

Question: In leaves, the food gets stored in the form of
a) Glucose
b) Fructose
c) Glycogen
d) Starch 

Answer: D

Question: Temporary finger like extension on amoeba are called
a) Cell membrane
b) Cilia
c) Pseudopodia
d) Cytopharynx

Answer: C

Question: Nuclei can be seen clearly seen in a well prepared slide of epidermal peel of a leaf in the
a) Guard cells only
b) Epidermal cells only
c) Guard cells as well as epidermal cells 
d) Stomata, guard cells and epidermal cells

Answer: C

Question: The process in which loss of water takes place in the form of water vapour through stomata is called
a) Transportation
b) Transpiration
c) Guttation
d) Translocation

Answer: B

Question: The plant part that do not involve in exchange of gas is
a) Leaf
b) Flower
c) Root
d) Stem

Answer: B

Question. Cardiac cycle in man takes about :-
a) 0.5 seconds
b) 1.0 seconds
c) 1.2 seconds
d) 0.8 seconds

Answer: D

Question. Where are red blood cells formed ?
a) Spleen
b) Liver
c) Red bone marrow of long bones
d) Thyroid

Answer: C

Question: Find out the structure which is not present in chloroplast
a) Granum
b) Stroma
c) Cristae
d) Thylakoid

Answer: C

Question: Autotrophic organisms include
a) Bacteria and virus
b) Bacteria and fungi
c) Green plants and some bacteria 
d) Green plants and all bacteria

Answer: C

Question: Loss of water from leaves will be less if stomata are
a) Only on lower surface 
b) Only on upper surface
c) On both the surfaces
d) Scattered

Answer: A

Question: Among the following group of plants, select the plant where you find stomata open at night and
close by day time
a) Epiphytes
b) Succulents
c) Mangroves
d) Hydrophytes

Answer: B

Question. The blood pressure is measured by :-
a) Electrocardiogram (ECG)
b) Stethoscope
c) Sphygmomanometer
d) Pulse rate

Answer: C

Question: Oxygen liberated during photosynthesis comes from
a) Water
b) Chlorophyll
c) Carbon dioxide
d) Glucose

Answer: A

Question: The stain that is generally used in preparing a temporary mount of a leaf put to show stomata is
a) Safranin
b) Hematoxylin
c) Acetocarmine
d) Eosin

Answer: A

Question: The type of leaf to be selected while preparing a temporary mount of a leaf peel to show stomata is
a) Turgid
b) Flaccid
c) Turbid
d) Flattened

Answer: A

Question: The type of nutrition followed in organisms like Cuscuta, ticks, lice, leeches and tapeworm is
a) Saprotrophic
b) Parasitic
c) Autotrophic
d) Diffusion

Answer: B

Question: Select the correct statement
a) Heterotrophs do not synthesise their own food
b) Heterotrophs utilise solar energy for photosynthesis
c) Heterotrophs synthesise their own food
d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Answer: A

Question. Ileum is
a) first part of the small intestine
b) middle part of the small intestine
c) last part of the small intestine
d) not a part of the small intestine

Answer: C

Question: Before removing chlorophyll, the leaf is boiled in which one of the following solvent
a) Formalin
b) Water
c) Alcohol
d) Glycerine

Answer: C

Question: The mode of nutrition in which an organism derives its food from the body of another living organism without killing it
a) Saprotrophic nutrition
b) Parasitic nutrition
c) Holozoic nutrition
d) Autrotrophic nutrition

Answer: B

Question: The first enzyme to mix with food in the digestive tract is
a) Pepsin
b) Cellulase
c) Amylase 
d) Trypsin

Answer: C

Question: When temperature increases, the rate of photosynthesis
a) Increases
b) Decreases
c) First increases then decreases again
d) Remains the same

Answer: C

Question: The process by which Amoeba obtains food is called
a) Phagocytosis
b) Assimilation
c) Diffusion
d) Absorption

Answer: A

In the following questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following.
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.

Question. Assertion: In anaerobic respiration, one of the end product is alcohol
Reason : There is an incomplete breakdown of glucose

Answer: A

Question. Assertion: All proteins in our food are digested in small intestine only
Reason: The protein digesting enzymes are released into small intestine

Answer: D

Question. Assertion: Veins have thin walls to collect blood from different organs
Reason : Blood in veins are not under pressure

Answer: A

Question. Assertion: In plants there is no need of specialized respiratory organs
Reason : Plants do not have great demands of gaseous exchange

Answer: A