Enzymes MCQs Part 8

title> Enzymes MCQs Part 7

1. The ion which activates salivary amylase activity is

• Chloride
• Bicarbonate
• Sodium
• Potassium

2. The pancreatic amylase activity is increased in the presence of

• Hydrochloric acid
• Bile salts
• Thiocyanate ions
• Calcium ions

3. carbohydrate which can not be digested in human gut is

• Cellulose
• Starch
• Glycogen
• Maltose

4. The sugar absorbed by facilitated diffusion and requiring Na independent transporter is

• Glucose
• Fructose
• Galactose
• Ribose

5. In the intestine the rate of absorption is highest for

• Glucose and galactose
• Fructose and mannose
• Fructose and pentose
• Mannose and pentose

6. Glucose absorption is promoted by

• Vitamin A
• Thiamin
• Vitamin C
• Vitamin K

7. The harmone acting directly on intestinal mucosa and stimulating glucose absorption is

• Insulin
• Glucagon
• Thyroxine
• Vasopressin

8. Given that the standard free energy change (ΔG^o) for the hydrolysis of ATP is –7.3 K cal/mol and that for the hydrolysis of Glucose 6-phosphate is –3.3 Kcal/mol, the ΔG^o for the phosphorylation of glucose is Glucose + ATP → Glucose 6– Phosphate + ADP.

• –10.6 Kcal/mol
• –7.3 Kcal/mol
• –4.0 Kcal/mol
• +4.0 Kcal/mol

9. At low blood glucose concentration, brain but not liver will take up glucose. It is due to the

• Low Km of hexokinase
• Low Km of glucokinase
• Specificity of glucokinase
• Blood brain barrier

10. In the reaction below, Nu TP stands for NuTP + glucose -> Glucose 6–Phosphate + NuDP.

• ATP
• CTP
• GTP
• UTP

Score =

Correct answers:

< Enzymes MCQs Parts = 1.. 2.. 3.. 4.. 5.. 6.. 7.. 8..

Animal Biotechnology MCQs Part 10

1. Which statement is NOT true about a retrovirus?

• It may cause cancer or AIDS
• It contains reverse transcriptase
• It is known to cause diseases only in animals, not in humans
• It has the capacity to integrate cDNA into the host DNA of the cell it infects

2. Blood cells that transport oxygen within the body are the _____________ .

• plasma
• erythrocytes
• platelets
• leukocytes

Animal Biotechnology MCQs Part 9

1. Introduction of foreign genes for improving genotype is ______________

• Tissue culture
• Immunisation
• Biotechnology
• Genetic engineering

2. Where do the female gonads (paired ovaries) lie?

• Pelvic cavity
• Thoracic cavity
• abdominal
• Scrotal sacs

Enzymes MCQs Part 7

1. In acute pancreatitis, the enzyme raised in first five days is

• Serum amylase
• Serum lactic dehydrogenase
• Urinary lipase
• Urinary amylase

2. Acute pancreatitis is characterised by

• Lack of synthesis of zymogen enzymes
• Continuous release of zymogen enzymes into the gut
• Premature activation of zymogen enzymes
• Inactivation of zymogen enzymes

3. An example of functional plasma enzyme is

• Lipoprotein lipase
• Amylase
• Aminotransferase
• Lactate dehydrogenase

4. A non-functional plasma enzyme is

• Psudocholinesterase
• Lipoprotein lipase
• Proenzyme of blood coagulation
• Lipase

5. The pH optima for salivary analyse is

• 6.6–6.8
• 2.0–7.5
• 7.9
• 8.6

6. The pH optima for pancreatic analyse is

• 4.0
• 7.1
• 7.9
• 8.6

7. The pH optima for sucrase is

• 5.0–7.0
• 5.8–6.2
• 5.4–6.0
• 8.6

8. The pH optima for maltase is

• 1.0–2.0
• 5.2–6.0
• 5.8–6.2
• 5.4–6.0

9. The pH optima for lactase is

• 1.0-2.0
• 5.4–6.0
• 5.0–7.0
• 5.8–6.2

10. The substrate for amylase is

• Cane sugar
• Starch
• Lactose
• Ribose

Score =

Correct answers:

Enzymes MCQs Parts => 1.. 2.. 3.. 4.. 5.. 6.. 7.. 8..

Biochemistry MCQs part 2

1. Which of the following statement is correct about membrane cholesterol?

• The hydroxyl group is located near the centre of the lipid layer
• Most of the cholesterol is in the form of a cholesterol ester
• The steroid nucleus form forms a rigid, planar structure
• The hydrocarbon chain of cholesterol projects into the extracellular fluid

2. Which one is the heaviest particulate component of the cell?

• Nucleus
• Mitochondria
• Cytoplasm
• Golgi apparatus

Biochemistry MCQs part 1

1. A drug which prevents uric acid synthesis by inhibiting the enzyme xanthine oxidase is

• Aspirin
• Allopurinol
• Colchicine
• Probenecid

2. Which of the following is required for crystallization and storage of the hormone insulin?

• Mn⁺⁺
• Mg⁺⁺
• Ca⁺⁺
• Zn⁺⁺