Part A The field of genetics has demonstrated that both molecular and transmissi
ID: 31445 • Letter: P
Question
Part A
The field of genetics has demonstrated that both molecular and transmission genetics characterize the same hereditary processes at different levels. For example, the wrinkled seed phenotype used by Mendel results from a defect in the gene that encodes which of the following products?
starch-branching enzyme
a. gibberellin 3-[beta] hydroxylase, an enzyme required for synthesis of the growth factor gibberellin b. an enzyme that catalyzes a step in the breakdown of chlorophyll c. a transcription factor that activates the expression of genes required for anthocyanin production d.starch-branching enzyme
Explanation / Answer
ANSWER:
Part-A :
starch-branching enzyme
the wrinkled trait is due to a disruption in the biochemical process responsible for making starch in these peas. During development of normal round peas, sugar is converted into starch, which is stored by the mature seed until needed for germination. Wrinkled peas convert much less of their sugar into starch. The sugar level builds up inside the pea and so they taste sweeter than round ones.
Part-B
Not clear question -Image missing
d.starch-branching enzyme
the wrinkled trait is due to a disruption in the biochemical process responsible for making starch in these peas. During development of normal round peas, sugar is converted into starch, which is stored by the mature seed until needed for germination. Wrinkled peas convert much less of their sugar into starch. The sugar level builds up inside the pea and so they taste sweeter than round ones.
Part-B
Not clear question -Image missing