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Biochemistry MCQs Cell , PH &Water
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Biochemistry MCQs Cell , PH &Water
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CELL & WATER1. The following is not found in prokaryotic cells:
a) Cytoplasmic membrane
b) DNA
c) Cytoplasm
d) Nucleus
e) RNA
2. Buffers in the human body include:
a) Carbohydrates
b) Phospholipids
c) Sulphuric Acid and Sulphate
d) Phosphoric Acid and Phosphate
e) None of the Above
3. Water is the ideal solvent in biological systems because of its:
a) Low melting point
b) Low dielectric constant
c) Dipolarity
d) High concentration in cells
e) High ionization potential
4. The following are organelles of prokaryotic cells:
a) Plasma membrane
b) Mitochondria
c) Cytoplasm
d) Endoplasmic reticulum
e) Both A and C are correct
5. The endoplasmic reticulum is:
a) Continuation of the plasma membrane
b) Site for protein synthesis
c) The major site for energy production
d) A double membrane organelle
e) Not found in hepatocytes
6. Mechanisms of transport across the plasma membrane:
a) Are identical in prokaryotes and eukaryotes
b) Include pinocytosis
c) Include phagocytosis
d) Require glycolipids
e) Both B and C are correct
, 7. Water participates in the following reactions:
a) Hydration
b) Dehydration
c) Hydrolysis
d) Thiolysis
e) All A, B and C are correct
8. The bonds that are mostly involved in interactions of biomolecules include:
a) The peptide bonds
b) The ionic bonds
c) The covalent bonds
d) Thioester bonds
e) Phosphodiester bonds
9. The dipolarity of water:
a) Results in covalent interaction
b) Facilitates the solubility of most biomolecules
c) Disappears in the solid state
d) Is the basis for ionic interactions
e) Is none of the above
10. Buffers in the human body do not include:
a) Proteins
b) Amino acids
c) Sulphuric acid & sulphate
d) Phospheric acid & phosphate
e) Carbonic acid & bicarbonate
11. Metabolic acidosis can result from:
a) Excessive vomiting
b) Uncontrolled diabetes mellitus
c) Increased pH
d) Increased carbohydrate intake
e) None of the above
12. The plasma pH is maintained by the buffering effect of:
a) Proteins
b) Carbonic acid & Bicarbonate
c) The kidney
d) Gastric HCl
e) A, B and C are correct
13. Buffers in the human body do not include:
a) Carbonic acid bicarbonate
b) Plasma proteins
c) Sulphuric acid & sulphate
d) Phospheric acid & phosphate
e) Hemoglobin
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