(Antonyms) Part – A : English (NDA/NA SOLVED PAPER 2024 – I) (101 to 150)

Total Questions: 50

21. In most prokaryotes, the chromosome number is:

Correct Answer: (d) 1
Solution:The chromosome number in prokaryotic cell is 1.

22. Bacterial DNA is referred to as naked because it is not associated with:

Correct Answer: (a) any scaffold
Solution:Bacterial DNA is referred to as naked as it is not associated with any scaffold or covered with membrane.

23. Which one among the following cells produces antibodies against a foreign antigen?

Correct Answer: (a) Lymphocytes
Solution:Lymphocytes will produce antibodies against any foreign antigen.

24. If the block Pas shown in the figure below were to be at rest, what should the magnitude of force F be?

Correct Answer: (c) 8N
Solution:At equilibrium of the block P,
Σfₓ = 0 ⇒ (2 + F + 15) - (10 + 15 = 0
F = 8N

25. Of the following, which does not belong to a nuclear reactor?

Correct Answer: (c) A mechanism to reduce CO₂ emission
Solution:The various components of a nuclear reactor are turbine, heat exchanger, reaction chamber etc. Nuclear reactor inherently do not produce CO₂ emissions during their operation.

26. Consider the following electric circuit:

The current in the above electric circuit is

Correct Answer: (a) 1A
Solution:

27. A microscope may be a combination of:

Correct Answer: (a) two convex lenses.
Solution:A microscope may be a combination of two convex lenses. The lenses facing eye and object are called eyepiece and objective respectively.

28. For a human eye, where u is the distance of an object from the eye, f is the focal length of the lens and v is the distance of image from the eye, which is the correct schematic graph?

Correct Answer: (c)
Solution:The eye lens has power of accomodation, due to which it maintain formation of image at the retina for different positions of the object. With increase of object distance, the focal length of eye lens increases and finally it becomes constant.

29. Which of the following statements with regard to the phenomenon of the primary rainbow formation by water droplets is/are correct?

1. It involves refraction and one internal reflection of sunlight.

2. It involves refraction of sunlight only.

3. It is formed as the inner bow.

4. It may involve more than one internal reflection as well as refraction of sunlight.

Select the answer using the code given below:

Correct Answer: (b) 1 and 3
Solution:For the formation of primary rainbow by water droplet, there are more than one refraction and only one internal reflection. The primary rainbow formed as inner bow, and its colours are visible in the sequence of red on the outer edge to violet on the inner edge.

30. Which one of the following scientists mentioned that an electron in an atom could revolve in certain stable orbits without the emission of radiant energy?

Correct Answer: (c) Niels Bohr
Solution:Niels Bohr mentioned that the electron in an atom revolves only in a certain fixed orbit in which angular momentum of electron is integral multiple of h/(2π).