Pre-Matriculation Biochemistry Part II Summative Exam

Question 1

Question:
A water-soluble micronutrient found exclusively in animal sources is essential for erythropoiesis.

What can result from deficiency of this compound?

Answer Choices:
1. Dry beriberi
2. Personality change
3. Spinal cord degeneration
4. Wernicke encephalopathy

Answer 1

3. Spinal cord degeneration

Question 2

Question:
What is special about the structures of enantiomers?

Answer Choices:
1. Equal halves
2. Non-mirror images
3. Non-superimposable mirror images
4. Opposite connectivity

Answer 2

3. Non-superimposable mirror images

Question 3

Question:
A water-soluble micronutrient found in seeds and grains is a cofactor for pyruvate dehydrogenase.

What can result from deficiency of this compound?

Answer Choices:
1. ATP depletion
2. Cheilosis
3. Corneal vascularization
4. Pellagra

Answer 3

1. ATP depletion

Question 4

Question:
A lipophilic micronutrient is stored in tissue.

Which of these molecules increases calcium and phosphate concentrations in plasma?

Answer Choices:
1. Vitamin A
2. Vitamin D
3. Vitamin E
4. Vitamin K

Answer 4

2. Vitamin D

Question 5

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Question 6

Question:
An increase in blood glucose levels following digestion of a meal causes insulin secretion.

What anabolic process will occur as a result?

Answer Choices:
1. Gluconeogenesis
2. Glycogenesis
3. Glycogenolysis
4. Glycolysis

Answer 6

2. Glycogenesis

Question 7

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Question 8

Question:
How are blood sugar levels maintained through starvation?

Answer Choices:
1. Gluconeogenesis
2. Glycolysis
3. Krebs cycle
4. Pentose phosphate pathway

Answer 8

1. Gluconeogenesis

Question 9

Question:
What type of eicosanoid is produced by leukocytes and is involved in contractions of the smooth muscle lining in the bronchioles?

Answer Choices:
1. Leukotriene
2. Prostaglandin
3. Thromboxane

Answer 9

1. Leukotriene

Question 10

Question:
A metabolic process occurs to enable the human body to obtain the maximum amount of energy from proteins during a period of starvation.

What is produced by deamination of glutamate during this process?

Answer Choices:
1. Ammonia
2. FADH2
3. Guanosine triphosphate
4. NADH

Answer 10

1. Ammonia

Question 11

Question:
What enzyme is found in both the glycolysis pathway and the gluconeogenesis pathway?

Answer Choices:
1. Malate dehydrogenase
2. Phosphoenolpyruvic acid carboxykinase
3. Phosphoglucoisomerase
4. Pyruvate carboxylase

Answer 11

3. Phosphoglucoisomerase

Question 12

Question:
What is the first enzyme involved in glycogen synthesis?

Answer Choices:
1. Glucose-1-phosphate
2. Pyrophosphate
3. UDP-glucose phosphorylase
4. Uridine triphosphate

Answer 12

3. UDP-glucose phosphorylase

Question 13

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Question 14

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Question 15

Question:
Pyruvate dehydrogenase converts pyruvate to acetyl-CoA.

Where does this process take place with respect to the mitochondria?

Answer Choices:
1. Cytosol
2. Inner membrane
3. Matrix
4. Ribosome

Answer 15

3. Matrix

Question 16

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Question 17

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Question 18

Question:
The travel of blood to the brain has become impeded.

What condition results from a leak of a blood vessel in the brain?

Answer Choices:
1. Embolic stroke
2. Hemorrhagic stroke
3. Ischemic stroke
4. Transient ischemic attack

Answer 18

2. Hemorrhagic stroke

Question 19

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Question 20

Question:
A buildup of cholesterol has caused cardiovascular disease.

What disease is associated with ischemic rest pain and is caused by this buildup?

Answer Choices:
1. Coronary artery disease
2. Peripheral artery disease
3. Stroke
4. Transient ischemic attack

Answer 20

2. Peripheral artery disease

Question 21

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Question 22

Question:
The pyruvate dehydrogenase complex converts a molecule in the mitochondria.

What is produced by this conversion?

Answer Choices:
1. Acetyl-CoA
2. Citrate
3. Glucose
4. Oxaloacetate

Answer 22

1. Acetyl-CoA