1. The most active site of protein synthesis is the
a) Nucleus
b) Ribosome
c) Mitochondrion
d) Cell sap
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
3. Mitochondrial DNA is
a) Circular double stranded
b) Circular single stranded
c) Linear double helix
d) None of these
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
5. The cellular organelles called “suicide bags” are
a) Lysosomes
b) Ribosomes
c) Nucleolus
d) Golgi’s bodies
6. From the biological viewpoint, solutions can be grouped into
a) Isotonic solution
b) Hypotonic solutions
c) Hypertonic solution
d) All of these
7. Bulk transport across cell membrane is accomplished by
a) Phagocytosis
b) Pinocytosis
c) Extrusion
d) All of these
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
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
10. A lipid bilayer is permeable to
a) Urea
b) Fructose
c) Glucose
d) Potassium