Difficulty: Easy

Average Score: 83%

Why is DNA important for metabolic activities of the cell?

Rationale

It controls the synthesis of enzymes.

DNA is crucial for metabolic activities in cells because it contains the genetic instructions necessary for the synthesis of enzymes, which catalyze biochemical reactions essential for metabolism. The sequence of nucleotides in DNA encodes the information required to produce specific proteins, including enzymes that facilitate various metabolic processes.

A (It initiates cellular mitosis.) YOUR ANSWER

While DNA is involved in cellular mitosis by ensuring accurate replication and distribution of genetic material, this process is not directly related to metabolic activities. Mitosis primarily focuses on cell division and growth rather than the metabolic reactions that occur within the cell.

B (It provides cell wall stability.) YOUR ANSWER

DNA does not play a role in providing stability to the cell wall. Instead, the stability of the cell wall is typically conferred by structural polysaccharides and proteins, depending on the type of organism. Thus, this choice is not relevant to the metabolic functions of DNA.

C (It increases glucose absorption.) YOUR ANSWER

DNA does not directly increase glucose absorption. Instead, glucose uptake is regulated by various transport proteins and hormones, such as insulin. While the expression of genes involved in these processes can be influenced by DNA, it does not directly control glucose absorption itself.

D (It controls the synthesis of enzymes.) CORRECT

This statement accurately reflects DNA's role in metabolism. DNA sequences encode the instructions for synthesizing enzymes, which are vital for catalyzing metabolic reactions. The regulation of enzyme synthesis allows cells to adapt their metabolic pathways in response to environmental changes.

Conclusion

DNA is fundamentally important for cellular metabolism because it encodes the genetic information necessary for the synthesis of enzymes, which drive metabolic processes. While it is involved in other cellular functions, such as mitosis and the regulation of glucose absorption, its primary role in metabolism lies in enzyme production. Understanding this relationship highlights the central role of DNA in maintaining cellular function and overall metabolic health.

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