BoardBiology

Life Processes

23 Board Biology previous year questions on Life Processes — options free on every question; 2 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW
PYQ

Bile juice is secreted by

a

Oral cavity

b

Liver

c

Small intestine

d

Stomach

✓ Correct answer: b)

Liver

Explanation

Correct Answer: B — Liver
Explanation: Bile juice is produced by the liver. It helps in the digestion of fats and is stored in the gall bladder.

Q2 FREE PREVIEW
PYQ

Which type of reaction is respiration?

a

Combination

b

Reduction

c

Endothermic

d

Oxidation

✓ Correct answer: d)

Oxidation

Explanation

Respiration is a biochemical process in which organisms release energy byu breaking down of complex molecules. It is a type of Oxidation reaction. Oxidation because glucose is broken down and energy is released during the process.

While other options are:

Combination reaction: When two or more reactants reacts to form a single product.

Reduction: When electrons are gained then reduction takes places.

Endothermic Reaction: Reaction which absorbs heat from surrounding.

Q3
PYQ

Goitre disease develops due to

a

obesity

b

lack of sugar

c

iodine deficiency

d

lack of blood

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q4
PYQ

Peptic ulcer can be caused by

a

Eating less food

b

Eating normal food

c

Prolonged starvation

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q5
PYQ

The transfer of \({\mathrm{O}}_{2}\) from outside environment to cells and removal \({\mathrm{CO}}_{2}\) is referred to as

a

Exhalation

b

Respiration

c

Inhalation

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q6
PYQ

Light reaction of photosynthesis takes place in

a

Stroma of chloroplast

b

Grana of chloroplast

c

Cytoplasm

d

Mitochondria

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q7
PYQ

Who among the following is called the 'Father of Biology' ?

a

Lamarck

b

Aristotle

c

Charles Darwin

d

Gregor Johann Mendel

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q8
PYQ

The posterior part of the oral cavity is

a

Oesophagus

b

Pharynx

c

Duodenum

d

Pancreas

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q9
PYQ

Xylem in plant is responsible for

a

Carrying of food

b

Carrying of oxygen

c

Carrying of amino acid

d

Carrying of water

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q10
PYQ

Which of the following statements is not true about fermentation?

a

This occurs in the absence of oxygen

b

This generally occurs in yeast

c

In this process pyruvate or pyruvic acid changes into CO₂ and ethanol

d

This process completes in mitochondria

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q11
PYQ

Which of the following is an example of geotropism ?

a

Growth of fruit

b

Growth of root

c

Growth of flower

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q12
PYQ

Bile juice is secreted in

a

Gallbladder

b

liver

c

Pancreas

d

Stomach.

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q13
PYQ

The main function of stomata is

a

Phytosynthesis

b

Gaseous exchange and transpiration

c

Nutrition

d

Transloction of food

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q14
PYQ

The biological process by which harmful products are removed from the body is called:

a

Reproduction

b

Excretion

c

Digestion

d

Circulation

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q15
PYQ

Double circulation is not found in

a

Frog

b

Fish

c

Bird

d

Human

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q16
PYQ

The excretory substance(s) of plants is/are

a

Tannin

b

Gum

c

Resin

d

All of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q17
PYQ

Where does glucose reabsorption occur?

a

In PCT

b

In DCT

c

In Henle's loop

d

All of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q18
PYQ

The mechanism for removing harmful substances formed as a result of various activities from the body is called

a

Digestive system

b

Circulatory system

c

Excretory system

d

Nervous system

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q19
PYQ

Which one of the following processes does not occur during photosynthesis?

a

Absorption of light energy by chlorophyll

b

Conversion of light energy into chemical energy

c

Reduction of CO₂ into carbohydrate

d

Breakdown of glucose into pyruvic acid

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q20
PYQ

Which of the following is known as the 'energy currency' of the cell ?

a

ATP

b

ADP

c

DTP

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q21
PYQ

Normal blood pressure of a healthy human is:

a

140 / 80

b

120 / 80

c

135 / 100

d

125 / 115

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q22
PYQ

What is the function of the villi located in small intestine?

a

Blocking absorption

b

Reducing the surface area of absorption.

c

Increasing the surface area of absorption.

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149
Q23
PYQ

From where does urea enter the blood?

a

Kidney

b

Lungs

c

Liver

d

None of these

🔒
Answer & explanation — PYQ Pass

Options are free to see. Unlock the correct answer and full explanation with Pass.

Unlock · ₹149

Practice more Board Biology PYQs

Browse every Biology chapter, or explore the full Board question bank.

All Biology chapters →