Fate of Ammonia

Q.

Which amino acid is formed when α-ketoglutaric acid reacts with ammonia during transamination?

1. Glutamic acid

2. Aspartic acid

3. Oxalo-acetic acid

4. None of the above

Q. One acetyl coA molecule entering the TCA cycle gives rise to molecules of NADH.

1. two
2. three
3. four
4. five

Q.

Which amino acid acts as a main donor of amino group in transamination?

1. Glutamic acid

2. Glutamine

3. Glutamate dehydrogenase

4. Glycine

Q.

Identify the enzymes catalysing reactions (A) and (B)

(A)$\alpha$-ketoglutarate + ${NH}^{4+}$ + NADPH $\to$ Glutamate + $H_{2}O$ + $NAD{P}^{+}$

(B)$R-CH-\left(COO\right)N{H}_2+R_1-\left(CO\right)COO\to R-\left(CO\right)COO+R_1-CH-\left(COO\right)N{H}_2$

1. A - Glutamate dehydrogenase, B - Transaminase

2. A - Transaminase, B - Glutamate dehydrogenase

3. A - Nitrogenase, B - Transaminase

4. A - Glutamate aminase, B - Dehydrogenase

Q.

Identify the enzymes catalysing reactions (A) and (B)

(A)$\alpha$-ketoglutarate + ${NH}^{4+}$ + NADPH $\to$ Glutamate + $H_{2}O$ + $NAD{P}^{+}$

(B)$R-CH-\left(COO\right)N{H}_2+R_1-\left(CO\right)COO\to R-\left(CO\right)COO+R_1-CH-\left(COO\right)N{H}_2$

1. A - Glutamate dehydrogenase, B - Transaminase

2. A - Transaminase, B - Glutamate dehydrogenase

3. A - Nitrogenase, B - Transaminase

4. A - Glutamate aminase, B - Dehydrogenase