Question

Which of the following is visible during cell division?

• A. Chromosomes
• B. DNA
• C. Chromatin fibres
• D. Ribosomes

Answer 1

The correct option is A Chromosomes

Deoxyribonucleic acid (DNA) encodes the genetic instructions, which are used in development and functioning of all living organisms. Each DNA strand is made of a basic unit of one nitrogenous base + phosphate group + sugar molecule. It is situated in the nucleus. It is not visible during cell division.
Chromatin fibers are made from coiling of a long polynucleotide strand of DNA to fit into the cell. It also helps to prevent DNA damage. These are not visible during cell division.
Ribosomes are cell organelles, which are present in free or in bound form. They are involved in protein synthesis. These are not visible during cell division.
A chromosome is a thread-like structure, which is made of DNA tightly coiled many times around protein core made of histone proteins. Histone protein supports and stabilizes the structure. During cell division, the chromosomes are duplicated and separated. For this purpose, they are condensed and are visible under the microscope.