Biochemistry Mock Test 1

10%

Question 1 of 10

1. Which of the following bases has the highest pK_a value?

NaOH

KCl

NaNO₃

KNO₃

Question 1 of 10

Question 2 of 10

2. What is the concentration of OH^- in a solution with a H⁺ concentration of 1.3×10^-4 M?

7.7×10^-12 M

7.7×10^-10 M

7.7×10^-11 M

7.7×10^-9 M

Question 2 of 10

Question 3 of 10

3. Calculate the pK_a of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.

3.9

4.1

4.0

3.3

Question 3 of 10

Question 4 of 10

4. What is the heat of vaporization of water?

1260 J/g

2260 kJ/g

1260 kJ/g

2260 J/g

Question 4 of 10

Question 5 of 10

5. Which of the following is not the classified form of conjugated proteins?

Metalloproteins

Lipoproteins

Glycoproteins

Complete proteins

Question 5 of 10

Question 6 of 10

6. Identify the products formed in the following reaction.

CH₃ COOCH₃ + H₂O → A + B

CO₂ and C₂H₆

CH₃ COOH and CH₃OH

CH₃ COOOH and CH₄

No reaction

Question 6 of 10

Question 7 of 10

7. Which of the following information is responsible to specify the three-dimensional shape of a protein?

The protein’s peptide bond

The protein’s amino acid sequence

The protein’s interaction with molecular chaperons

The protein’s interaction with other polypeptides

Question 7 of 10

Question 8 of 10

8. Which of the following is a hypotonic solution?

0.45% sodium chloride

10% dextrose in water

Oceans

5% dextrose in 0.9% sodium chloride

Question 8 of 10

Question 9 of 10

9. ΔG is negative for which of the following processes?

Oxidation of nitrogen

Oxidation of gold

Melting of ice and evaporation of water

Burning of chlorine

Question 9 of 10

Question 10 of 10

10. The buffer capacity is equal to __________

pH / Δn

± 1pKa

± 2pKa

Δn / ΔpH

Question 10 of 10