NEET Test 189

Result

NEET Test 189

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The kinetic energy of a body increases from 50 J to 150 J in 10 s. Then the power of the body is:

A
10 W

B
5 W

C
100 W

D
0 W

Solution

Given,

KE₁= 50J

KE₂= 150J

t = 10s

As we know,

The work-energy theorem states that the net work done by the forces on an object is equal to the change in its kinetic energy.

W = ΔKE

Where W = work done and ΔKE = change in kinetic energy

By the work-energy theorem,

W = ΔKE

∴ W = KE₂ − KE₁

⇒ W = 150 − 50

⇒ W = 100J

So, the power of the body (P) = W/t

Where W = work and t = time

∴ P = 100/10

⇒ P = 10W
Question 2
4 / -1

When ₃Li⁷ nuclei are bombarded by protons, and the resultant nuclei are ₄Be⁸, the emitted particles will be:

A
Alpha particles

B
Beta particles

C
Gamma photons

D
Neutrons

Solution
Question 3
4 / -1

National Botanical Research Institute is situated in

A
Chennai

B
Patna

C
Bangalore

D
Lucknow

Solution

The National Botanical Research Institute (NBRI) is a research institute of CSIR in Lucknow. It is engaged in the field of taxonomy and modern biology.
Question 4
4 / -1

A particle of mass M at rest decays into two masses m₁ and m₂ with non-zero velocities. The ratio of de Broglie wavelengths of particles is

A

B

C
1

D
None of these

Solution

According to de Broglie's hypothesis, the momentum of the particle is inversely proportional to the wavelength of the particle. Use the law of conservation of momentum to relate the momentum of both particles using de Broglie's hypothesis.
Question 5
4 / -1

The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as:

A
Transformation

B
Translocation

C
Crossing over

D
Chromosomal aberration

Solution

The exchange of segments of non-sister chromatids between chromosomes of a homologous pair is termed as crossing over.

Translocation is the process of exchange of segments of two non-homologous pairs of chromosomes.

Chromosomal aberration is the alteration in the chromosome number or structural changes within the chromosome.

Transformation is the process of transfer of DNA from one bacterial cell to another.
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

The coefficient of friction between the tyres of a car and the road is 0.25. The maximum speed with which the car can be driven around a curve of radius 40m without skidding is (assume g = 10ms⁻²)

A
40 ms⁻¹

B
20 ms⁻¹

C
15 ms⁻¹

D
10 ms⁻¹

Solution
Question 8
4 / -1

The enzyme required for removing RNA primer during DNA replication is:

A
DNA primase

B
DNA polymerase I

C
DNA polymerase III

D
DNA ligase

Solution

DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. The DNA replication process uses DNA polymerase III to catalyze the joining of deoxyribonucleoside 5′-triphosphates (dNTPs) at a growing chain of DNA. DNA is read by DNA polymerase in the 3′ to 5′ direction, meaning the new strand is synthesized in the 5' to 3' direction.
Question 9
4 / -1

The ____ relays impulses from the CNS to skeletal muscles.

A
Somatic neural system

B
Autonomic neural system

C
The central neural system

D
The vertebral system

Solution

The nervous system is divided into central and peripheral nervous systems. The PNS is divided into two divisions called somatic neural system and autonomic neural system. The somatic neural system relays impulses from the CNS to skeletal muscles while the autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles of the body.
Question 10
4 / -1

What is self-pollination?

A
Pollens of a flower falling on another flower

B
Pollens of a flower falling on the stigma of the same flower

C
Pollens of the flower falling of the stigma of another flower of the same plant

D
Pollens of a flower falling on any flower

Solution

Self-pollination means fertilization by pollens of the same flower. When the pollens from the anther fall on the stigma of the same flower, the style carries the pollen to the ovaries. This is known as self-pollination.

Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Self-pollination occurs in flowers where the stamen and carpel mature at the same time, and are positioned so that the pollen can land on the flower's stigma.