Which of the following statements about Deoxyribonucleic Acid (DNA) is/are correct?
- DNA is composed of nucleotides, each containing a sugar, a phosphate group, and one of four nitrogenous bases.
- Mitochondrial DNA (mtDNA) is inherited paternally and is unique to each individual.
- The sequence of nitrogenous bases in DNA encodes genetic information used in growth, development, and reproduction.
- Nuclear DNA is identical in all individuals except in the case of identical twins.
Select the correct answer using the code given below
Explanation - Deoxyribonucleic Acid (DNA) is the hereditary material in almost all living organisms. It carries the genetic instructions used in growth, development, functioning, and reproduction. Structure — DNA is composed of two long strands forming a double helix, made up of repeating units called nucleotides. Each nucleotide contains a sugar, a phosphate group, and one of four nitrogenous bases — Adenine (A), Thymine (T), Cytosine (C), or Guanine (G). The specific sequence of these bases encodes genetic information. Location — DNA is primarily located in the nucleus of cells (nuclear DNA), while a small amount is also found in mitochondria (mitochondrial DNA or mtDNA). Nuclear DNA is unique to each individual (except identical twins), whereas mtDNA is inherited maternally and found in multiple copies per cell. Function — DNA controls cellular functions by coding for proteins, and it passes genetic traits from one generation to the next.
Explanation - Deoxyribonucleic Acid (DNA) is the hereditary material in almost all living organisms. It carries the genetic instructions used in growth, development, functioning, and reproduction. Structure — DNA is composed of two long strands forming a double helix, made up of repeating units called nucleotides. Each nucleotide contains a sugar, a phosphate group, and one of four nitrogenous bases — Adenine (A), Thymine (T), Cytosine (C), or Guanine (G). The specific sequence of these bases encodes genetic information. Location — DNA is primarily located in the nucleus of cells (nuclear DNA), while a small amount is also found in mitochondria (mitochondrial DNA or mtDNA). Nuclear DNA is unique to each individual (except identical twins), whereas mtDNA is inherited maternally and found in multiple copies per cell. Function — DNA controls cellular functions by coding for proteins, and it passes genetic traits from one generation to the next.