Question:

During replication of a bacterial chromosomes DNA synthesis starts from a replication origin site and

Updated On: Oct 12, 2023

  • Is facilitated by telomerase

  • Moves in one direction of the size 

  • Moves in bi-directional way

  • RNA primers are involved 

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The Correct Option is C

Solution and Explanation

In contrast to the linear DNA found in vertebrates, bacterial chromosomes consist of circular DNA. The replication process commences at a specific location known as the origin. However, instead of proceeding in a single direction around the chromosome, it occurs in two directions. This phenomenon is referred to as bidirectional replication, involving two replication forks moving away from the origin in opposite directions. Ultimately, these forks converge at the base of the chromosome, marking the conclusion of replication as the two chromosomes separate. Additionally, it's important to note that the bacterial chromosome can initiate multiple replication forks simultaneously.
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Concepts Used:

Biomolecules

Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.

There are four major classes of Biomolecules –  Carbohydrates, Proteins, Nucleic acids and Lipids.

  1. Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
  2. Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
  3. Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
  4. Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.