THE CHEMISTRY OF LIFE

Question 1

Which of the following statement does not describe active transport:

A. Movement of a substance across a cell membrane against its concentration gradient
B. Transport of molecules through protein pores
C. Energy dependent
D. Involves electrochemical gradient

Answer 1

B. Transport of molecules through protein pores

Question 2

What is the bond between the 1’ C of the sugar and the nitrogen base?

A. Hydrogen bond
B. Covalent bond
C. Phosphodiester bond
D. Glycosidic bond
E. Both B and C

Answer 2

D. Glycosidic bond

Question 3

Useful for estimating the pH of a buffer solution and find in the equilibrium of pH in acid-base reaction:

A. Michaelis Menten Equation
B. Henderson Hasselbalch Equation
C. Double-reciprocal plot
D. Lineweaver Burk Plot

Answer 3

B. Henderson Hasselbalch Equation

Question 4

These substances are large, complex organic molecules and are usually polymers:

A. Biological molecules
B. Macromolecules
C. Biomolecules
D. All of these

Answer 4

D. All of these

Question 5

Which of the following statements describes catabolism?

I. Breaking down of polymers
II. A hydrolytic (hydrolysis) reaction
III. Maltose = glucose + glucose

A. I only
B. II and III
C. I and III
D. I, II and III
E. III only

Answer 5

D. I, II and III

Question 6

Anabolism is described as:

A. Condensation reaction
B. Dehydration synthesis
C. Building up of monomers
D. Water is one of the product
E. All of these

Answer 6

E. All of these

Question 7

What vitamin can be used in the management of hyperlipidemia?

A. Thiamine
B. Riboflavin
C. Niacin
D. Panthothenic acid

Answer 7

C. Niacin

Question 8

Which of the following is true regarding anabolism?

A. It is involved in the breakdown of larger molecules
B. It consumes energy
C. It commonly involves oxidative reactions
D. It is exergonic

Answer 8

B. It consumes energy

Question 9

Which of the following is/are example(s) of catabolism?

A. Glycogenesis
B. Glycolysis
C. Beta oxidation
D. Both A and B
E. Both B and C

Answer 9

E. Both B and C

Question 10

Which of the following pairing regarding biomolecules is correct?

A. Most common element: C, H, O, N
B. Present in small amount: P, S, Ca, Mg, Na, Cl
C. Trace elements: Fe, Cu, Mn, Zn
D. All are correct

Answer 10

D. All are correct

Question 11

Which of the following pairing is incorrect?

A. Vitamin C: Scurvy
B. Vitamin B1: Wernicke Korsakoff Syndrome
C. Vitamin B3: Pellagra
D. Vitamin A: Night blindness
E. Vitamin E: Osteomalacia

Answer 11

E. Vitamin E: Osteomalacia

Question 12

The major buffer of the extracellular fluid:

A. Bicarbonate-carbon dioxide
B. Amino acids
C. Phosphate

Answer 12

A. Bicarbonate-carbon dioxide

Question 13

Hypertonic solutions will cause the cell to:

A. Swell
B. Shrink
C. Burst
D. Hemolysis
E. Precipitated

Answer 13

B. Shrink