NEET Test 73

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NEET Test 73

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Weekly Quiz Competition

Question 1
4 / -0

Which of the following statements is correct?

a. rRNA is the most abundant RNA.

b. Ribosomes are composed of approximately 80% rRNA and 20% ribosomal proteins.

c. rRNA is a type of coding RNA.

A
Statements 'a' 'b' and 'c' are correct

B
Statement 'a' is correct

C
Statements 'a' and 'c' are correct

D
Statements 'b' and 'c' are correct

Solution

rRNA is most abundant in the cell. It constitutes 80% of the total RNA of the cell. Ribosomes are composed of approximately 60% rRNA and 40% ribosomal proteins. rRNA is a type of non-coding RNA.

Hence, the correct option is (B).
Question 2
4 / -0

A double-slit apparatus is immersed in a liquid of refractive index 1.33. It has slit separation of 1mm and distance between the plane of slits and the screen is 1.33m. The slits are illuminated by a parallel beam of light whose wavelength in air is What is the fringe width?

A
0.8379 mm

B
0.63 / 1.33 mm

C
0.63 / (1.33)² mm

D
0.63 mm

Solution
Question 3
4 / -0

For the reaction, 2Cl(g) → Cl₂(g), the correct option is:

A
∆_rH > 0 and ∆_rS > 0

B
∆_rH > 0 and ∆_rS < 0

C
∆_rH < 0 and ∆_rS > 0

D
∆_rH < 0 and ∆_rS < 0
Question 4
4 / -0

If the electron in the hydrogen atom jumps from the third orbit to the second orbit, the wavelength of the emitted radiation in term of Rydberg constant is:

A
6/5R

B
36/5R

C
64/7R

D
36/7R

Solution
Question 5
4 / -0

Identify a molecule that does not exist.

A
He₂

B
Li₂

C
C₂

D
O₂
Question 6
4 / -0

When radiation is incident on an optical electron emitter, the resistive potential 9 V is obtained. If the value of e/m for the electron is 1.8 ×10¹¹Ckg⁻¹, the maximum velocity of the emitted electrons is

A
6 ×10⁵m^s-1

B
8 ×10⁵m^s-1

C
10⁶ m^s-1

D
1.8 ×10⁶m^s-1

Solution
Question 7
4 / -0

Two spherical conductors B and C having equal radii and carrying equal charges, repel each other with force F when kept apart at some distance. A third spherical conductor having the same radius as that of B, but uncharged, is brought in contact with B, then with C and finally removed away from both. The new force of repulsion between B and C is

A
F/4

B
3F/4

C
F/8

D
3F/8

Solution
Question 8
4 / -0

A particle executing simple harmonic motion of amplitude 5 cm has a maximum speed of 31.4 cm/s. The frequency of its oscillation is:

A
3H_z

B
2 H_z

C
4 H_z

D
1 H_z

Solution
Question 9
4 / -0

RNA which carry amino acid from the cytoplasm to the ribosome is:

A
m-RNA

B
t-RNA

C
r-RNA

D
c-RNA

Solution

Ribosomes are very fine particles located in the cell fluid of a living cell, which have an important role in the synthesis of proteins. They convert signals from genetic material (DNA or RNA) into the protein chain. They are found on the upper surface of the endoplasmic reticulum, in addition to those found in mitochondria and chloroplasts. tRNA carries amino acid at its 3' end amino acid attachment site.

Hence, the correct option is (B).
Question 10
4 / -0

An object of mass 40kg having velocity 4m/s collides with another object of mass 60kg having velocity 2m/s. The collision is perfectly inelastic. The loss in energy is:

A
24J

B
48J

C
72J

D
96J

Solution

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Re-Attempt Weekly Quiz Competition

NEET Test 73

Result

NEET Test 73

Score

-

Rank

-

SHARING IS CARING

Question 1

Statements 'a' 'b' and 'c' are correct

Statement 'a' is correct

Statements 'a' and 'c' are correct

Statements 'b' and 'c' are correct

Solution

Question 2

0.8379 mm

0.63 / 1.33 mm

0.63 / (1.33)2 mm

0.63 mm

Solution

Question 3

∆rH > 0 and ∆rS > 0

∆rH > 0 and ∆rS < 0

∆rH < 0 and ∆rS > 0

∆rH < 0 and ∆rS < 0

Question 4

6/5R

36/5R

64/7R

36/7R

Solution

Question 5

He2

Li2

C2

O2

Question 6

6 ×105 ms-1

8 ×105 ms-1

106 ms-1

1.8 ×106 ms-1

Solution

Question 7

F/4

3F/4

F/8

3F/8

Solution

Question 8

3Hz

2 Hz

4 Hz

1 Hz

Solution

Question 9

m-RNA

t-RNA

r-RNA

c-RNA

Solution

Question 10

24J

48J

72J

96J

Solution

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0.63 / (1.33)² mm

∆_rH > 0 and ∆_rS > 0

∆_rH > 0 and ∆_rS < 0

∆_rH < 0 and ∆_rS > 0

∆_rH < 0 and ∆_rS < 0

He₂

Li₂

C₂

O₂

6 ×10⁵m^s-1

8 ×10⁵m^s-1

10⁶ m^s-1

1.8 ×10⁶m^s-1

3H_z

2 H_z

4 H_z

1 H_z