[MCQ] INTRODUCTION TO BIOCHEMISTRY- Part 2

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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. 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

9. 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
10. A lipid bilayer is permeable to
(A) Urea (B) Fructose
(C) Glucose (D) Potassium
11. The Golgi complex
(A) Synthesizes proteins
(B) Produces ATP
(C) Provides a pathway for transporting chemicals
(D) Forms glycoproteins
12. The following points about microfilaments
are true except
(A) They form cytoskeleton with microtubules
(B) They provide support and shape
(C) They form intracellular conducting channels
(D) They are involved in muscle cell contraction
13. The following substances are cell
inclusions except
(A) Melanin (B) Glycogen
(C) Lipids (D) Centrosome
14. Fatty acids can be transported into and
out of cell membrane by
(A) Active transport (B) Facilitated transport
(C) Diffusion (D) Osmosis
15. Enzymes catalyzing electron transport
are present mainly in the
(A) Ribosomes
(B) Endoplasmic reticulum
(C) Lysosomes
(D) Inner mitochondrial membrane
16. Mature erythrocytes do not contain
(A) Glycolytic enzymes(B) HMP shunt enzymes
(C) Pyridine nucleotide(D) ATP
17. In mammalian cells rRNA is produced
mainly in the
(A) Endoplasmic reticulum
(B) Ribosome
(C) Nucleolus
(D) Nucleus
18. Genetic information of nuclear DNA is
transmitted to the site of protein synthesis
by
(A) rRNA (B) mRNA
(C) tRNA (D) Polysomes
19. The power house of the cell is
(A) Nucleus (B) Cell membrane
(C) Mitochondria (D) Lysosomes
20. The digestive enzymes of cellular
compounds are confined to
(A) Lysosomes (B) Ribosomes
(C) Peroxisomes (D) Polysomes