MCAT Behavioral Sciences Question 236: Answer and Explanation
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Question: 236
6. Based on Figure 1, what is a logical function of CREB?
- A. Interact with the genomic DNA to enhance transcription
- B. Interact with RNA to enhance translation
- C. Bind ribosomes to enhance transcription
- D. Bind RNA polymerase to enhance replication
Correct Answer: A
Explanation:
In the diagram, CREB is located immediately before gene activation, which would suggest it has something to do with transcription (choices B and D are wrong). Ribosomes do not have anything to do with transcription (choice C is wrong and choice A is correct). CREB stands for cAMP Response Element Binding and is a transcription factor; thus, it interacts with DNA to enhance transcription.