NEET Test 197

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NEET Test 197

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Weekly Quiz Competition

Question 1
4 / -1

The main area of various types of activities of a cell is:

A
plasma membrane

B
mitochondrion

C
cytoplasm

D
nucleus

Solution

The cytoplasm is a granular, crystallo-colloidal complex that forms the living protoplasm of a cell excluding its nucleus. It consists of proteins, nucleic acids, fats, carbohydrates, vitamins, minerals, waste metabolites, and all the organelles. It is the main area for various types of activities of cell-like respiration, nutrition, storage, etc.
Question 2
4 / -1

If the degree of freedom of a gas molecule be f, then the ratio of two specific heat is given by:

A

B

C

D

Solution
Question 3
4 / -1

The final product in the following reaction will be a _______.

A
Primary alcohol

B
Secondary alcohol

C
Tertiary alcohol

D
Ketone

Solution

Acid is added in the second step to protonate the negatively charged oxygen.
Question 4
4 / -1

The input resistance of a common emitter transistor amplifier, if the output resistance is 500kΩ, the current gain α = 0.98 and power gain is 6.0625 × 10⁶, is

A
198Ω

B
300Ω

C
100Ω

D
400Ω

Solution
Question 5
4 / -1

Identify the wrong statement with reference to immunity.

A
Active immunity is quick and gives full response

B
Foetus receives some antibodies from mother, it is an example for passive immunity

C
When exposed to antigen (living or dead) antibodies are produced in the host's body. It is called "Active immunity"

D
When ready-made antibodies are directly given, it is called "Passive immunity"

Solution

When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body. This type of immunity is called active immunity.

Active immunity is slow and takes time to give its full effective response.
Question 6
4 / -1

Which of the following statements is not correct according to molecular orbital theory?

A

B

C
Bond strength of N₂ is the maximum amongst the homonuclear diatomic molecules belonging to the second period.

D
Be₂ and Ne₂ are unstable molecules.

Solution
Question 7
4 / -1

If E = energy, G = gravitational constant, I = impulse and M = mass, then the dimensions of are the same as those of:

A
Time

B
Mass

C
Length

D
Force

Solution
Question 8
4 / -1

In sickle cell anemia due to point mutation, the sixth amino acid, glutamic acid in beta chain of hemoglobin is replaced by

A
Alanine

B
Tyrosine

C
Valine

D
Serine

Solution

In sickle cell anaemia due to point mutation, the sixth amino acid, glutamic acid in the beta chain of haemoglobin is replaced by valine. Sickle cell anaemia results in an abnormality in the oxygen-carrying protein haemoglobin found in red blood cells.

Sickle cell disease occurs when a person inherits two abnormal copies of the haemoglobin gene, one from each parent.
Question 9
4 / -1

The state of hybridisation of central atoms in the dimer of BH₃ and BeH₂.

A
sp²,sp²

B
sp³,sp²

C
sp³,sp³

D
sp²,sp³

Solution

The state of hybridisation of central atom in dimer of BH₃ and BeH₂ are sp³,sp².
Question 10
4 / -1

In the graph (1), A, B and C respectively are:

A
SO₃,SO₂ and O₂

B
SO₃,O₂ and SO₂

C
SO₂,O₂ and SO₃

D
O₂,SO₂ and SO₃

Solution