FREE NEET MCQ Test Questions and Answers

Question 1

What is true about the following statements?

Accepted Answer

All Chondrichthyes are marine animals with a streamlined body with some exceptions

Answer

Larva of all cyclostomes return to freshwater after metamorphosis

Answer

All mammals have placenta

Answer

Chelone and Testudo are able to maintain a constant body temperature

Question 2

A table tennis ball with a conducting tip on it hangs between two metal plates and is supported by a thin thread. One plate is connected to the earth, while the other is to a high-voltage generator, with the ball in between.

Accepted Answer

Swings backward & forward hitting each plate in turn

Answer

Hangs without moving

Answer

Is repelled by an earthed plate and stays there

Answer

Is attracted to the high voltage plate and stays there

Question 3

The corners of a cubic unit cell in a solid "AB" with a NaCl structure are occupied by "A" atoms. The solid's resulting stoichiometry is as follows if all the atoms with faces to one of the axes are eliminated:

Accepted Answer

A3B4

Answer

A4B3

Answer

A2B

Answer

AB2

Question 4

Which of the following metal pollutants found in vehicle exhaust is the most hazardous?

Accepted Answer

Lead

Answer

Mercury

Answer

Copper

Answer

Cadmium

Question 5

Which of the following about the myelin sheath is incorrect?

Accepted Answer

Myelin sheath is seen only as an outermost layer of a whole Schwann cell.

Answer

It is mainly secreted by the Schwann cells in the cranial and spinal nerves.

Answer

The gaps between two adjacent myelin sheaths are called nodes of Ranvier.

Answer

Schwann cells are lipid-rich cells enveloping the axon.

Question 6

Which of the following multicellular animals lacks neurons or nerve cells that can react to stimuli?

Accepted Answer

Sponge

Answer

Anemone

Answer

Hydra

Answer

Only a and b

Question 7

Which of the subsequent antibody subtypes is produced by a peanut hypersensitive person?

Accepted Answer

IgE

Answer

IgA

Answer

IgM

Answer

IgD

Question 8

In the presence of an attacking reagent, the displacement of electrons in numerous bonds is known as:

Accepted Answer

Electromeric effect

Answer

Hyper conjugation

Answer

Resonance

Answer

Inductive effect

Question 9

Rhododendron leaves curling is one instance of?

Accepted Answer

Thermotropism

Answer

Thigmotropism

Answer

Phototropism

Answer

Hydrotropism

Question 10

An increase in CO2 levels will result in:

Accepted Answer

Faster and deeper breathing

Answer

Slower and deeper breathing

Answer

Slower and shallow breathing

Answer

No effect on breathing