Question 1
What is the pH value when 75mL of 1.5M phosphoric acid is added to 30 mL of 2.5M sodium dihydrogen phosphate? Given
that the Ka of phosphoric acid is 7.11x10 -3 mol dm3
Answers:
A. 2.15
B. 2.32
C. 4.15
D. 1.97
E. 7.50
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Question 2
Please estimate the pI value of Aspartate.
Answers: A.2
B. 3
C.4
D.7
E.10
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Question 3
Which of the following amino acid side chains (highlighted yellow) can function as an acid?
Answers: A. A
B. B
C. C
D. D
E. None of the above
https://www.coursehero.com/file/50629349/BCHE2030-MC-1pdf/
Question 4
Which of the following results in alkalosis? 1. Prolonged vomiting; 2. Acute lung injury; 3. Massive blood loss; 4.
Hyperventilation
Answers: A. 1&2
B. 2&3
C. 1, 2&4
D. 1&4
Question 5
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E. 4 only
Which of the following descriptions for carbohydrates that are not polysaccharide is/are correct? 1. They are all reducing sugar;
2. They can be found in our energy-producing organelle; 3. They are all water-soluble; 4. They are all colorless.
Answers: A. 1
B. 2
C. 1&3
D. 1, 2&3
E. 1, 2, 3&4
Question 6
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Which of the following statements regarding carbohydrates is/are true? 1. All monosaccharides have optical isomers; 2.
Glycogen exists in muscle cell; 3. Cellulose is so tough that cannot be broken down; 4. Carbohydrates are oxygenated
hydrocarbons
Answers: A. 1&2
B. 2
C. 1,3&4
D. All of the above
https://www.coursehero.com/file/50629349/BCHE2030-MC-1pdf/
Question 7
How many chiral carbon atom exist in the following structure?
Answers: A. 0
C. 2
D. 3
E. 4
Question 8
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B. 1
What is the name of the following molecule?
Answers: A. α-D-Fructose
B. α-L- Fructose
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C. β-D- Fructose
D. β-L- Fructose
E. γ-L-Fructose
https://www.coursehero.com/file/50629349/BCHE2030-MC-1pdf/
Question 9
Answers: A. a
B. b
C. c
D. d
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Which of the following molecules contains a β-1,3 glycosidic bond?
E. None of the above
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Question 10
Which of the following(s) could be the repeating unit of glycosaminoglycan(s) (GAG(s))?
Answers: A. 1
B. 2
C.4
D. 2, 3&4
E. None of the above
https://www.coursehero.com/file/50629349/BCHE2030-MC-1pdf/
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