Biochemistry Practice Test 7

1. Free ammonia combined with glutamate to yield glutamine by the action of ___________

Glutaminase

Glutamine synthase

Amino transferase

Glutamate dehydrogenase

2. Glucagon is released from ___________

Muscle

Epithelial tissues

Pancreas

Kidneys

3. Which of the following takes place in substrate level phosphorylation?

High energy intermediate compounds cannot be isolated

Oxidation of one molecule of substrate is linked to synthesis of more than one ATP molecule

Only mitochondrial reactions participate in ATP formation

Substrate reacts to form a product containing a high energy bond

4. What is Mitochondrial DNA?

Simple, single stranded circular DNA molecule

Simple, double stranded circular DNA molecule

Simple, single stranded linear DNA molecule

Simple, double stranded linear DNA molecule

5. The combined action of aminotransferase and glutamate dehydrogenase is referred as ___________

Transamination

Oxidative deamination

Transdeamination

Reductive deamination

6. Glucose 6-phosphatase is present only in ___________

Liver

Kidneys

Epithelial tissues

Muscle

7. The branched chain amino acid is not _________

Leucine

Isoleucine

Valine

Alanine

8. What is the necessary coenzyme for transamination reactions?

Pyridoxal phosphate

Thiamine pyrophosphate

Coenzyme A

NAD

9. Which of the following is not an essential amino acid?

Glycine

Leucine

Histidine

Methionine

10. The only membrane bound enzyme in the citric acid cycle is _________

Acyl co-A dehydrogenase

ATP synthase

NADH dehydrogenase

Succinate dehydrogenase