1) Which of the following is true of stabilizing forces in secondary structures,

ID: 57126 • Letter: 1

Question

1) Which of the following is true of stabilizing forces in secondary structures, but not tertiary structure?

A) Ionic interactions between oppositely charges side chains.

B) H-bonding between polar side chains.

C) Hydrophobic interactions between side chains.

D) H-bonding between the oxygen of the backbone carbonyl and hydrogen of the backbone amine.

E) None of the above.

2) Allosteric enzymes can be identified because the plot of velocity versus substrate concentration is not hyperbolic. but is __________.

3) You are given the formula Vo = Vmax ([S] / ([S] + Km).

a) When substrate concentration is much greater than Km, the rate of catalysis is almost equal to ___________.

b) When substrate concentration is much less than Km, the rate of catalysis is dependent upon _________________.

1. D. H-bonding between the oxygen of the backbone carbonyl and hydrogen of the backbone amine.

This bonding is present in alpha helix and beta pleated sheets. IT is not present in the tertiary structure.

2. sigmoidal

3. a. Vmax

b. substrate concentration

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