An allosteric inhibitor does which of the following? a. Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding, b. Binds to the active site and blocks it from binding substrate, c. Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate, d. Binds directly to the active site and mimics the substrate.

Where in a phylogenetic tree would you expect to find the organism that had evolved most recently? a. at the base, b. within the branches, c. at the nodes, d. at the branch tips.

Choose the best answer.

Which of the following illustrates negative control?

a. A repressor that becomes active when bound to a corepressor and inhibits transcription.

b. A gene that binds a repressor and becomes active.

c. An activator that becomes active when bound to a coactivator and activates transcription.

d. A repressor that binds a gene and becomes inactive.

Compare the three staggered conformations of ethylene glycol. The anti conformation of ethylene glycol is not the lowest energy conformation. The other two staggered conformations are actually lower in energy than the anti conformation. Suggest an explanation.

For a particular chemical reaction, an inhibitor raises the K$_{\mathrm{M}}$ but does not affect the V$_{\max }$. This inhibitor

a. is a competitive inhibitor.

b. is a noncompetitive inhibitor.

c. binds to the active site of the enzyme.

d. binds to an allosteric site of the enzyme.

e. is a competitive inhibitor and binds to the active site of the enzyme.

What is the difference between an allosteric site and an active site?

______ inhibitor binds to a site on the enzyme that is not the active site.

What type of inhibitor binds to the enzyme's active site?

Extend the linearly independent set $\mathcal{V}$ to a basis for V.

$$\mathcal{V}=\left\{\left[\begin{array}{ll} 1 & 0 \\ 0 & 1 \end{array}\right],\left[\begin{array}{ll} 0 & 1 \\ 1 & 0 \end{array}\right],\left[\begin{array}{ll} 1 & 1 \\ 1 & 0 \end{array}\right]\right\}, V=\mathrm{R}^{2 \times 2}$$

Water moves via osmosis across plasma cell membranes in which direction?

The energy released by the hydrolysis of ATP is used for ____________.

In addition to ATP, what are the end products of glycolysis?

A.) CO2 and H20

B.) NADH and pyruvate

C.) CO2 and pyruvate H20,

D.) FADH2, and citrate CO2 and NADH

Which of the following is not an example of an energy transformation? a. Turning on a light switch, b. Solar panels at work, c. Formation of static electricity, d. None of the above.

Prokaryotic cells are much smaller than eukaryotic cells. What advantages might small cell size confer on a cell? What advantages might large cell size have?