Question

describe the structure of DNA with the help of a labeled diagram​

Answer 1

Explanation:

The structure of DNA and RNA. DNA is a double helix, while RNA is a single helix. ... Deoxyribonucleic acid, or DNA, is a molecule that contains the instructions an organism needs to develop, live and reproduce.

“DNA is a group of molecules that is responsible for carrying and transmitting the hereditary materials or the genetic instructions from parents to offsprings.”

This is also true for viruses as most of these entities have either RNA or DNA as their genetic material. For instance, some viruses may have RNA as their genetic material, while others have DNA as the genetic material. The Human Immunodeficiency Virus (HIV) contains RNA, which is then converted into DNA after attaching itself to the host cell.

Deoxyribonucleic acid or DNA is an organic compound that has a unique molecular structure. It is found in all prokaryotic cells and eukaryotic cells.

Apart from being responsible for the inheritance of genetic information in all living beings, DNA also plays a crucial role in the production of proteins. Nuclear DNA is the DNA contained within the nucleus of every cell in a eukaryotic organism. It codes for the majority of the organism’s genomes while the mitochondrial DNA and plastid DNA handles the rest.

The DNA present in the mitochondria of the cell is termed as mitochondrial DNA. It is inherited from the mother to the child. In humans, there are approximately 16,000 base pairs of mitochondrial DNA. Similarly, plastids have their own DNA, and they play an essential role in photosynthesis.

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Answer 2

Answer:

DNA

• Full form of DNA is Deoxynucleic Acid.
• DNA is discovered by Friedrich Meisher.
• DNA is present in cytoplasm as well as in nucleus.
• In prokaryotes , DNA is present only in cytoplasm.
• In eukaryotes , DNA is present in both cytoplasm as well as in nucleus.
• DNA can be circular as well as linear.
• Backbone of DNA is made up of sugar and phosphate.
• Both strand of DNA are antiparallel to each other.
• Complementary base pairing is present in DNA i.e., purines are binds with pyrimidines. ( Adenine binds with Thymine and Guanine binds with Christine ).
• Due to complementary base pairing diameter of DNA remains constant.

Helical stability of DNA is due to

1. Hydrogen bonds
2. One plane of base pair stacks over another.