Nucleus | MCQs

Explanation

• The mass number (A) is the sum of protons and neutrons present in the nucleus of an atom.
• It is a measure of the total number of nucleons (protons and neutrons) in the nucleus.

Explanation

• Tritium, also known as superheavy hydrogen.
• It has 1 proton and 2 neutrons in its atomic nucleus.

Explanation

The nucleus is primarily composed of protons and neutrons, collectively called nucleons.

Explanation

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell.

Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.

Explanation

• The nucleus is responsible for cell division because it contains chromosomes, which are made up of DNA and proteins.
• Chromosomes carry the genetic information necessary for cell division, growth, and function.

Explanation

• Chromosomes are thread-like structures in the nucleus that carry genetic information in the form of DNA.
• They contain the instructions needed to build and maintain the cell, and control its functions.