Question

The contribution of cytoplasmic DNA in the total DNA of a cell
A. 90-95%
B. 65-75%
C. 35-45%
D. 1-5%

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definition of cytoplasmic DNA.
Cytoplasmic DNA (cDNA) is a form of genetic material that resides in the cytosol, the water-logged interior part of cells. This cDNA can be extracted from expressed gene products or templates contained within mRNA using reverse transcriptase enzyme and primer pairs specific to the cDNA sequence.

Complete step by step solution:
Cytoplasmic DNA is the non-chromosomal DNA that resides in the cytoplasm of cells. This type of DNA has been shown to play a significant role in cell function and can be used to modify or transfer genes between cells. In fact, it is estimated that about 60% of all genetic information is contained within this form of DNA.
An organism's nucleic acids are made up of both DNA and RNA. Ribonucleic acid (RNA) is primarily found in the cytoplasm of the cell, whereas deoxyribonucleic acid (DNA) is primarily located in the nucleus of the cell and is typically created there. Organelles found in the cytoplasm, such as mitochondria and chloroplast, contain DNA as extrachromosomal material.
Since extrachromosomal DNA is simple to recognize and separate, it is frequently employed in replication research. Only 1% to 5% of the cell's total DNA is represented by it.
Therefore, the contribution of cytoplasmic DNA to the total DNA of a cell is 1% to 5%

Option ‘D’ is correct

Note:
Cytoplasmic DNA is a small but essential component of the total DNA in a cell. It plays an important role in regulating how genes are expressed, and it can also help to protect the genome from damage. Additionally, cytoplasmic DNA helps to control protein synthesis by serving as a template for gene transcription.