NEET Test 174

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NEET Test 174

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Weekly Quiz Competition

Question 1
4 / -1

If the Coefficient of friction is μ then what is the least value of μ so the system remains at rest:

A
0.23

B
0.2

C
0.203

D
0.13

Solution

The tendency of motion will be towards the left so friction will oppose that motion now for least μ, frictional force should be maximum
Question 2
4 / -1

Which of the following is not true of RNA processing?

A
Exons are excised and hydrolysed before mRNA moves out of the nucleus

B
An initial RNA transcript is much longer than the final RNA molecule that may leave the nucleus

C
RNA splicing may be catalyzed by spliceosomes

D
Existence of exons and introns may facilitate crossing over between regions of a gene that code for polypeptide domains

Solution

In most eukaryotic genes, coding regions (exons) are interrupted by noncoding regions (introns). During transcription, the entire gene is copied into a pre-mRNA, which includes exons and introns. During the process of RNA splicing, introns are excised and hydrolysed before mRNA moves out of the nucleus and exons are joined to form a continuous coding sequence.
Question 3
4 / -1

Why plants in forests do not make use of all the light energy available to them?

A
Because plants do not require energy

B
Because plants are grown only in the winter season

C
Because of the absence of chlorophyll

D
Because sunlight doesn’t fall on the leaves fully

Solution

Plants in forests do not make use of all the light energy available to them ecause sunlight doesn’t fall on the leaves fully.

All plants require light energy in order to obtain energy. This energy is providing by sun known as ultimate source of energy. When sun light falls on the plants in the dense forest due to its shady branches of big trees which forms canopy.
Question 4
4 / -1

Which of the following chemical compounds form the antibodies?

A
Carbohydrates

B
Proteins

C
Vitamins

D
Lipids

Solution

Antibodies are immune system-related proteins called immunoglobulins. Each antibody consists of four polypeptides– two heavy chains and two light chains joined to form a "Y" shaped molecule. The amino acid sequence in the tips of the "Y" varies greatly among different antibodies.
Question 5
4 / -1

By which of the following reagents, butanoic acid can be converted into butane?

A
RedP/HI

B
NaOH/CaO

C
CH₃MgBr

D
All of these

Solution

Butanoic acid can be converted to butane by heating with hydriodic acid (HI) and red phosphorus (Red P).
Question 6
4 / -1

Which statement regarding coenzyme is incorrect?

A
Every cofactor is a coenzyme and every coenzyme is a cofactor

B
Every coenzyme is a cofactor but every cofactor is not a coenzyme

C
Most of the coenzymes are nucleotides and are composed of vitamins

D
Coenzymes are the active constituents of enzymes

Solution

Every coenzyme is a cofactor but every cofactor is not coenzyme. Cofactors can be classified depending on how tightly they bind to an enzyme, with loosely bound cofactors termed coenzymes and tightly bound cofactors termed prosthetic groups.
Question 7
4 / -1

By studying the effects of gene one can tell ______ role of a gene in the body.

A
Chemical

B
Biological

C
Psychological

D
Physiological

Solution

The biological role of the introduced foreign gene can be predicted or observed by studying the effects of the gene in transgenic animals. The manipulated gene can introduce a new character or may lead to the loss of a character.
Question 8
4 / -1

At 25^∘C, the solubility product of Mg(OH)₂ is 1.0 ×10⁻¹¹. At which pH, will Mg²⁺ ions start precipitating in the form of Mg(OH)₂ from a solution of 0.001MMg²⁺ ions ?

A
10

B
8

C
11

D
7

Solution
Question 9
4 / -1

Which of the following statements is correct?

A
Ionic crystal of AgBr does not have Frenkel defect.

B
The unit cell having lattice parameter, i.e. a = b≠ c and crystal angles, i.e. α =β = 90^o and γ = 120^o, is hexagonal.

C
In an ionic compound having Schottky defect, the ratio r⁺/ r^- is very high.

D
The coordination number of Na⁺ in NaCl is 4.

Solution

The unit cell having lattice parameter, i.e. a = b ≠ c and crystal angles, i.e. α= β = 90^o and γ = 120^o, is hexagonal.
Question 10
4 / -1

The enzyme enterokinase helps in conversion of:

A
Protein into polypeptides

B
Trypsinogen into trypsin

C
Caseinogen into casein

D
Pepsinogen into pepsin

Solution

The enzyme enterokinase helps in conversion of inactive trypsinogen into active trypsin.

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NEET Test 174

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NEET Test 174

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Question 1

0.23

0.2

0.203

0.13

Solution

Question 2

Exons are excised and hydrolysed before mRNA moves out of the nucleus

An initial RNA transcript is much longer than the final RNA molecule that may leave the nucleus

RNA splicing may be catalyzed by spliceosomes

Existence of exons and introns may facilitate crossing over between regions of a gene that code for polypeptide domains

Solution

Question 3

Because plants do not require energy

Because plants are grown only in the winter season

Because of the absence of chlorophyll

Because sunlight doesn’t fall on the leaves fully

Solution

Question 4

Carbohydrates

Proteins

Vitamins

Lipids

Solution

Question 5

RedP/HI

NaOH/CaO

CH3MgBr

All of these

Solution

Question 6

Every cofactor is a coenzyme and every coenzyme is a cofactor

Every coenzyme is a cofactor but every cofactor is not a coenzyme

Most of the coenzymes are nucleotides and are composed of vitamins

Coenzymes are the active constituents of enzymes

Solution

Question 7

Chemical

Biological

Psychological

Physiological

Solution

Question 8

10

8

11

7

Solution

Question 9

Ionic crystal of AgBr does not have Frenkel defect.

The unit cell having lattice parameter, i.e. a = b ≠ c and crystal angles, i.e. α =β = 90o and γ = 120o, is hexagonal.

In an ionic compound having Schottky defect, the ratio r+/ r- is very high.

The coordination number of Na+ in NaCl is 4.

Solution

Question 10

Protein into polypeptides

Trypsinogen into trypsin

Caseinogen into casein

Pepsinogen into pepsin

Solution

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CH₃MgBr

The unit cell having lattice parameter, i.e. a = b≠ c and crystal angles, i.e. α =β = 90^o and γ = 120^o, is hexagonal.

In an ionic compound having Schottky defect, the ratio r⁺/ r^- is very high.

The coordination number of Na⁺ in NaCl is 4.