Biology Mcqs Practice Test

Question 1

Proteins are made from amino acids by the process of ______________?

Accepted Answer

C. Dehydration synthesis

Question 2

An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called?

Accepted Answer

B. Phyletic lineage

Question 3

Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

Accepted Answer

D. Active transport

Question 4

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?

Accepted Answer

B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.

Question 5

Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ?

Accepted Answer

A. Concentration of water molecules inside and outside the cell

Question 6

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by ?

Accepted Answer

B. Paleontologist

Question 7

Most cell membranes are composed principally of ?

Accepted Answer

B. Protein and Lipids

Question 8

A large regional community primarily determined by climate is called ?

Accepted Answer

C. Biome

Question 9

Which of the following pathogen type cause disease that can be treated with antibiotics ?

Accepted Answer

A. bacteria

Question 10

Different species of plants and animals living in the same habitat is called?

Accepted Answer

B. Community

Question 11

The evaporative cooling in the respiratory tract of dogs is called?

Accepted Answer

C. Panting

Question 12

Group of living organisms of the same species living in the same place at the same time is called ?

Accepted Answer

B. Population

Question 13

Production of sweat and sebum is related with ?

Accepted Answer

A. Skin

Question 14

In animals coordination is achieved by means of?

Accepted Answer

D. Both A and B

Question 15

Haemodialysis means cleaning of____________?

Accepted Answer

B. Blood

Question 16

A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:

Accepted Answer

C. A Tissue

Question 17

Which one of them is a micro-molecule?

Accepted Answer

D. ATP

Question 18

The atoms of different elements combine with each other through ionic or covalent bonding to produce compounds this stable form is called:

Accepted Answer

B. A molecule

Question 19

Oxygen accounts for ____ % of totals human body mass?

Accepted Answer

A. 65%

Question 20

___________ are needed as a source of energy for the vital activities of the body?

Accepted Answer

D. Carbohydrates