Biochemistry Questions and Answers Part-3

1. The most active site of protein synthesis is the
a) Nucleus
b) Ribosome
c) Mitochondrion
d) Cell sap

Answer: b

2. The fatty acids can be transported into and out of mitochondria through
a) Active transport
b) Facilitated transfer
c) Non-facilitated transfer
d) None of these

Answer: b

3. Mitochondrial DNA is
a) Circular double stranded
b) Circular single stranded
c) Linear double helix
d) None of these

Answer: a

4. The absorption of intact protein from the gut in the foetal and newborn animals takes place by
a) Pinocytosis
b) Passive diffusion
c) Simple diffusion
d) Active transport

Answer: a

5. The cellular organelles called “suicide bags” are
a) Lysosomes
b) Ribosomes
c) Nucleolus
d) Golgi’s bodies

Answer: a

6. From the biological viewpoint, solutions can be grouped into
a) Isotonic solution
b) Hypotonic solutions
c) Hypertonic solution
d) All of these

Answer: d

7. Bulk transport across cell membrane is accomplished by
a) Phagocytosis
b) Pinocytosis
c) Extrusion
d) All of these

Answer: d

8. Carrier protein can
a) Transport only one substance
b) Transport more than one substance
c) Exchange one substance to another
d) Perform all of these functions

Answer: d

9. The ability of the cell membrane to act as a selective barrier depends upon
a) The lipid composition of the membrane
b) The pores which allows small molecules
c) The special mediated transport systems
d) All of these

Answer: d

10. A lipid bilayer is permeable to
a) Urea
b) Fructose
c) Glucose
d) Potassium

Answer: a