Q. Consider the following statements regarding the flow of genetic information:
1.Transcription is the process where a DNA segment is copied into messenger RNA (mRNA) within the nucleus.
2.Translation is the process by which ribosomes in the cytoplasm use mRNA instructions to assemble amino acids into proteins.
3.According to the Central Dogma, genetic information flows in a multi-directional path: primarily from Proteins back to DNA.
Which of the statements given above are correct?
Answer: A
Notes:
Explanation:
Statements 1 and 2 are correct. Transcription and translation are the two main steps of gene expression, forming the basis of protein synthesis. Transcription copies DNA into mRNA within the nucleus, while translation uses that mRNA at cytoplasmic ribosomes to assemble amino acids into proteins. This central dogma moves genetic information from DNA to functional proteins.
Statement 3 is incorrect. The Central Dogma states that information flow is unidirectional: DNA RNA Protein. It does not flow from proteins back to DNA.
