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INTRODUCTION TO BIOCHEMISTRY- Part 1
See all quizzes of INTRODUCTION TO BIOCHEMISTRY- Part 1 here:
1. A drug which prevents uric acid synthesis
by inhibiting the enzyme xanthine
oxidase is
(A) Aspirin (B) Allopurinol
(C) Colchicine (D) Probenecid
2. Which of the following is required for
crystallization and storage of the
hormone insulin?
(A) Mn++ (B) Mg++
(C) Ca++ (D) Zn++
3. Oxidation of which substance in the body
yields the most calories
(A) Glucose (B) Glycogen
(C) Protein (D) Lipids
4. Milk is deficient in which vitamins?
(A) Vitamin C (B) Vitamin A
(C) Vitamin B2 (D) Vitamin K
5. Milk is deficient of which mineral?
(A) Phosphorus (B) Sodium
(C) Iron (D) Potassium
6. Synthesis of prostaglandinsis is inhibited
by
(A) Aspirin (B) Arsenic
(C) Fluoride (D) Cyanide
7. HDL is synthesized and secreted from
(A) Pancreas (B) Liver
(C) Kidney (D) Muscle
8. Which are the cholesterol esters that enter
cells through the receptor-mediated
endocytosis of lipoproteins hydrolyzed?
(A) Endoplasmin reticulum
(B) Lysosomes
(C) Plasma membrane receptor
(D) Mitochondria
9. Which of the following phospholipids is
localized to a greater extent in the outer
leaflet of the membrane lipid bilayer?
(A) Choline phosphoglycerides
(B) Ethanolamine phosphoglycerides
(C) Inositol phosphoglycerides
(D) Serine phosphoglycerides
10. All the following processes occur rapidly
in the membrane lipid bilayer except
(A) Flexing of fatty acyl chains
(B) Lateral diffusion of phospholipids
(C) Transbilayer diffusion of phopholipids
(D) Rotation of phospholipids around their long
axes
11. Which of the following statement is
correct about membrane cholesterol?
(A) The hydroxyl group is located near the centre
of the lipid layer
(B) Most of the cholesterol is in the form of a
cholesterol ester
(C) The steroid nucleus form forms a rigid, planar
structure
(D) The hydrocarbon chain of cholesterol projects
into the extracellular fluid
12. Which one is the heaviest particulate
component of the cell?
(A) Nucleus (B) Mitochondria
(C) Cytoplasm (D) Golgi apparatus
13. Which one is the largest particulate of the
cytoplasm?
(A) Lysosomes
(B) Mitochondria
(C) Golgi apparatus
(D) Entoplasmic reticulum
14. The degradative Processess are categorized
under the heading of
(A) Anabolism (B) Catabolism
(C) Metabolism (D) None of the above
15. The exchange of material takes place
(A) Only by diffusion
(B) Only by active transport
(C) Only by pinocytosis
(D) All of these
16. The average pH of Urine is
(A) 7.0 (B) 6.0
(C) 8.0 (D) 0.0
17. The pH of blood is 7.4 when the ratio
between H2CO3 and NaHCO3 is
(A) 1 : 10 (B) 1 : 20
(C) 1 : 25 (C) 1 : 30
18. The phenomenon of osmosis is opposite
to that of
(A) Diffusion (B) Effusion
(C) Affusion (D) Coagulation
19. The surface tension in intestinal lumen
between fat droplets and aqueous
medium is decreased by
(A) Bile Salts (B) Bile acids
(C) Conc. H2SO4 (D) Acetic acid
20. Which of the following is located in the
mitochondria?
(A) Cytochrome oxidase
(B) Succinate dehydrogenase
(C) Dihydrolipoyl dehydrogenase
(C) All of these
