Which of the following sugars can be a substrate for glucokinase? O a. glucose O b. fructose O c. mannose O d. all of these e, none of these

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Answer 1

Sugars that can be a substrate for glucokinase is glucose. Hence Option A is Correct.

Glucokinase is an enzyme that helps to convert glucose to glucose-6-phosphate in the first step of glucose metabolism in the cells of the liver and pancreas. It has a high affinity for glucose and has a role in the glucose-sensing mechanism of pancreatic beta cells. The enzyme has a low affinity for glucose in comparison to other hexokinases and is only present in the liver and pancreas.

Glucokinase has a high Km value for glucose, allowing it to serve as a glucose sensor for insulin secretion by pancreatic beta cells.

Sugars that can be a substrate for glucokinase is glucose. Glucokinase has a high Km value for glucose, allowing it to serve as a glucose sensor for insulin secretion by pancreatic beta cells. Hence Option A is Correct.

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6 1 point Choose the following options which indicate pleiotropy: A mutant allele at one locus X creates mice with brown fur, while an allele at locus Y creates mice with red eye color. When mice are

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The options that indicate pleiotropy in this scenario are: "A mutant allele at one locus X creates mice with brown fur" and "an allele at locus Y creates mice with red eye color."

Pleiotropy refers to a genetic phenomenon where a single gene or allele influences multiple, seemingly unrelated traits or phenotypes. In the given scenario, the following options indicate pleiotropy:

"A mutant allele at one locus X creates mice with brown fur."This suggests that a mutation at locus X affects both the color of the mouse's fur and potentially other traits."An allele at locus Y creates mice with red eye color."This indicates that an allele at locus Y influences the color of the mouse's eyes, which is a distinct trait from the fur color affected by locus X.

By having different alleles at these loci (X and Y), the mice exhibit different phenotypes for both fur color and eye color. This demonstrates the concept of pleiotropy, where a single gene or allele can have multiple effects on the organism's traits.

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