Assertion: In eukaryotes, the replication of DNA takes place at S phase of the cell cycle. Reason: The replication of DNA and cell division cycle should be highly coordinated because a failure in division after DNA replication results into polyploidy.?

Question

Answer

Assertion and Reasoning in Eukaryotes DNA Replication

Assertion:

In eukaryotes, the replication of DNA takes place at S phase of the cell cycle.

Reason:

The replication of DNA and cell division cycle should be highly coordinated because a failure in division after DNA replication results in polyploidy.

Explanation:

The replication of DNA is a crucial process in the cell cycle of eukaryotes. The cell cycle consists of four phases: G1, S, G2, and M. DNA replication occurs during the S phase of the cell cycle, which is the period of DNA synthesis. During this phase, the DNA double helix unwinds, and each strand serves as a template for the synthesis of a new complementary strand. This process results in the formation of two identical daughter DNA molecules.

The replication of DNA and cell division cycle in eukaryotes must be coordinated because a failure in division after DNA replication can result in polyploidy. Polyploidy is a condition in which an organism has more than two sets of chromosomes. This condition can arise due to errors in cell division, resulting in the failure of the separation of chromosomes during mitosis. Therefore, it is essential to ensure that DNA replication and cell division occur in a coordinated manner to prevent such errors.

In conclusion, the assertion that DNA replication occurs during the S phase of the cell cycle in eukaryotes is correct. The reason that the replication of DNA and cell division cycle should be highly coordinated to prevent polyploidy is also true. Thus, the assertion and reasoning are both correct and related to each other.

Answer

Assertion and reason correct but reason is not correct explanation of the statement i

Similar Class 12 Doubts

Assertion: The replication does not initiate randomly at any place in DNA and there is a definite region in DNA where the replication originates which is termed as origin of replication. Reason: In bacterial DNA, there are multiple ori but in eukaryotic DNA, there is only a single ori?

Directions:There are two statements marked as Assertion (

Assertion: The process of DNA replication is semi discontinuous Reason: On one DNA strand the replication is continuous, while on the other strand it is discontinuous?

Assertion The DNA dependent DNA polymerases catalyze polymerisation only in one direction, that is 5'-3' Reason: The DNA polymerases on their own cannolinilate the process of replication?

Assertion: Any mistake curing replication would result into mutations. Reason: Energetically replication is an Inexpensive process as it does not require more energy for the process.?

Top Courses for Class 12

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams