Biology Practice Questions Set 15

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For India's Top Government Exams

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Two strands of DNA are held together by ___
*

1 point

hydrogen bonds

covalent bonds

electrostatic force

Van der Waals’ forces

Which organelle in the cell, other than the nucleus, contains DNA?
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1 point

Endoplasmic reticulum

Golgi apparatus

Lysosome

Mitochondria

In humans, which one among the following with reference to breathing is correct?
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1 point

During inhalation, the diaphragm relaxes

During exhalation, the thorax cavity expands

During inhalation, intra-pleural pressure becomes more negative

Unlike inhalation, normal exhalation is an active process

A person on rice and vegetable made up of potato only. He is likely to suffer from a deficiency of ___
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1 point

carbohydrate and vitamins

proteins

carbohydrate and proteins

proteins and fats

Which one among the following groups of animals maintains constant body temperature in changing environmental conditions?
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1 point

Birds

Fishes

Amphibians

Reptiles

Which one among the following groups of items contains only biodegradable items?
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1 point

Paper, grass, glass

Wood, flower, iron-scrap

Sewage, plastic, leather

Cow dung, paddy husk, vegetable wastes

Blood does not coagulate inside the body due to the presence of
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1 point

hemoglobin

heparin

fibrin

plasma

Human blood is a viscous fluid. This viscosity is due to ___ *

1 point

proteins in blood

platelets in plasma

sodium in serum

RBC and WBC in blood

Vaseline was applied to both surfaces of the leaves of a plant. Which of the following process/ processes would be affected?

1. Photosynthesis
2. Respiration
3. Transpiration
Select the correct answer using the codes given below

1 point

1 and 3

Only 2

2 and 3

All of these

Which one among the following gases readily combines with the hemoglobin of the blood?
*

1 point

Methane

Nitrogen dioxide

Carbon monoxide

Sulfur dioxide

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