Both Water and Glucose Share an -OH That Can Serve

question 55

Multiple Choice

Both water and glucose share an -OH that can serve as a substrate for a reaction with the terminal phosphate of ATP catalyzed by hexokinase.Glucose,however,is about a million times more reactive as a substrate than water.The best explanation is that:

• A)glucose has more -OH groups per molecule than does water.
• B)the larger glucose binds better to the enzyme;it induces a conformational change in hexokinase that brings active-site amino acids into position for catalysis.
• C)the -OH group of water is attached to an inhibitory H atom,while the glucose -OH group is attached to C.
• D)water and the second substrate,ATP,compete for the active site resulting in a competitive inhibition of the enzyme.
• E)water normally will not reach the active site because it is hydrophobic.

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Definitions:

Discrete

A term describing any set of data that can only take on specific, distinct values and cannot be subdivided meaningfully, such as countable items.

Continuous

Pertains to quantities that can assume an infinite number of values within a given range.

Categorical

Describes variables that can take on one of a limited and usually fixed number of possible values, assigning each individual or other unit of observation to a particular group or nominal category.

Binomial Probability

Binomial Probability is the probability of observing a specific number of successful outcomes in a fixed number of trials, with each trial having the same probability of success.