CELL STRUCTURE AND ORGANELLE(I) biology MCQ’s questions answers

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CELL STRUCTURE AND ORGANELLE(I)

Question 1 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a biochemical analysis of mitochondria LIAS to be done, the best procedure would be:
A
Select cells which have a larger number of mitochondria.
B
Plasmolyse the cell and filter out the mixture and take the debris.
C
Grind the cells and filter out the mixture and take the debris.
D
Subject the cell to cell fractionation (centrifuge) and obtain mitochondria.
Question 2 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which structure serves as a protective layer against attack by phagocytes and by viruses?
A
Capsule
B
Appendages
C
Mesosome
D
Mitochondria
Question 3 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following substances are present in plant cell wall?
(i) Pectin. (ii) Suberin.
(iii) Cutin. (iv) Lignin.
(v) Silica. (vi) Callose.
(vii) Algin. (viii) Murein.
A
(i), (ii), (iii), (iv), (vii).
B
(i), (ii). (v), (vii), (viii).
C
(i), (ii), (iii), (v), (vi), (vii).
D
(ii), (iii), (v), (vii), (viii).
Question 4 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Consider the following statements:
(i) With regarding to plasma membrane, glycoproteins acts as recognition site, the site for attachment and provide antigen specificity to cell membrane.
(ii) Cholesterol provides both stability and fluidity to the cell membrane.
(iii) Spectrin is an extrinsic protein found in the plasma membrane.
(iv) Glycerophospholipids are the major phospholipids in the biological membrane.
A
(i) and (ii) are false.
B
All except (ii) are true.
C
(i), (ii) and (iii) are false.
D
Only (iv) is true.
Question 5 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The thickness of a unit membrane is:
A
55Angstrom .
B
35Angstrom.
C
20Angstrom.
D
75Angstrom.
There are 5 questions to complete.

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