Identify the enzyme that catalyzes the following reaction.
$$\alpha {\text{ - Ketoglutarate}} + NADH + NH_4^ + + {H^ + } \to {\text{Glutamate}} + NA{D^ + } + {H_2}O$$

Which one of the following is INCORRECT about protein structures?

A. A protein fold is stabilized by favorable noncovalent interactions

B. All parts of a fold can be classified as helices, strands or turns

C. Two non-covalent atoms cannot be closer than the sum of their van der Waals radii

D. The peptide bond is nearly planar

Which one of the following amino acids has three ionizable groups?

A. Glycine

B. Leucine

C. Valine

D. Lysine

During lactic acid fermentation, net yield of ATP and NADH per mole of glucose is

A. 2 ATP and 2 NADH

B. 2 ATP and 0 NADH

C. 4 ATP and 2 NADH

D. 4 ATP and 0 NADH

The reactions leading to the formation of amino acids from the TCA cycle intermediates are

A. Carboxylation

B. Isomerization

C. Transamination

D. Decarboxylation