Both Water and Glucose Share an -OH That Can Serve

question 12

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.

---

Definitions:

Fundamental Risk

The risk associated with an underlying factor that affects all investments across the board, such as inflation or political instability.

Momentum Effects

The phenomenon where securities that have performed well in the past continue to perform well in the near future, and vice versa.

Resistance Level

The resistance level in trading is a price point above which a security or market is unlikely to rise, often leading to a sell-off when approached.

Support Level

A price level below which a stock or market rarely falls, representing a point where buying interest overcomes selling pressure.