Question

What might be one explanation for the difference in the growth rate of the strains when the sugar source changes in a growth medium?

1) Different sugars can act as effector or repressor molecules in various strains, promoting or inhibiting transcription of genes depending on the type of sugar present.
2) Operons for anabolic pathways are controlled by many global regulatory mechanisms, and different sugars can favor initiation of different pathways depending on the strain of yeast.
3) All of the choices are correct.
4) Catabolic repression strategies of operons for using different sugars may vary among strains, thereby favoring initiation of transcription in one strain over another depending on the sugar.

Answer 1

The difference in growth rate of strains when the sugar source changes in a growth medium can be explained by different sugars acting as effector or repressor molecules, operons being controlled by global regulatory mechanisms, and varying catabolic repression strategies among strains.

Step-by-step explanation:

The difference in growth rate of strains when the sugar source changes in a growth medium can be explained by several factors. One possible explanation is that different sugars can act as effector or repressor molecules in various strains, promoting or inhibiting transcription of genes depending on the type of sugar present. Another explanation is that operons for anabolic pathways are controlled by many global regulatory mechanisms, and different sugars can favor initiation of different pathways depending on the strain of yeast. Additionally, catabolic repression strategies of operons for using different sugars may vary among strains, thereby favoring initiation of transcription in one strain over another depending on the sugar.