Biology MCQs

Question 1

Which of the following may cause the breakdown of pyruvate into lactic acid in our muscles?

Accepted Answer

Lack of Oxygen

Answer

Lack of water

Answer

Lack of carbon dioxide

Answer

Lack of nitrogen

Question 2

The main result of aerobic respiration is the

Accepted Answer

Production of ATP from the breakdown of glucose

Answer

Production of lactic acid as an end product

Answer

Conversion of radiant energy into chemical energy

Answer

Storage of energy in a polysaccharide

Question 3

What compound directly provides energy for cellular work?

Accepted Answer

ATP

Answer

ADP

Answer

NADP

Answer

NADH

Question 4

The outer membrane that covers the lungs

Accepted Answer

Pleura

Answer

Dura mater

Answer

Pia mater

Answer

Myelin sheath

Question 5

The process in which energy stored in carbohydrates is released

Accepted Answer

Respiration

Answer

Photosynthesis

Answer

Reproduction

Answer

Excretion

Question 6

What is the purpose of the mucus in your nose?

Accepted Answer

Protects lungs

Answer

Clear air passage

Answer

Protects nose

Answer

All of the above

Question 7

Precentage of CO2 found in exhaled air is

Accepted Answer

0.04

Answer

0.08

Answer

0.12

Answer

0.16

Question 8

Muscles get tired when there is shortfall of ________ .

Accepted Answer

ATP

Answer

Lactic acid

Answer

Na+ ions

Answer

Sulphates

Question 9

Cellular respiration is best associated with the

Accepted Answer

Mitochondrion

Answer

Microtubule

Answer

Ribosome

Answer

Golgi apparatus