691.
Vacuole in a plant cell
A
is membrane-bound and contains storage proteins and lipids
B
is membrane-bound and contains water and excretory substances
C
lacks membrane and contains air
D
lacks membrane and contains water and excretory substances
Answer :
is membrane-bound and contains water and excretory substances
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692.
Acrosome of sperm is derived from
A
Golgi vesicle
B
Lysosome
C
Golgi tuble
D
Cisternae
Answer :
Golgi vesicle
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693.
Which structure mainly maintains composition of mitochondrial matrix
A
Outer membrane
B
Inner membrane
C
A and B both
D
Both membrane and Perimitochondrial space
Answer :
Inner membrane
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694.
What is the angle between two centriole of a centrosome
A
300
B
450
C
600
D
900
Answer :
900
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695.
Plasma membrane is fluid strcture due to presence of
A
Carebohydrate
B
Lipid
C
Glyco protein
D
Poly saccharide
Answer :
Lipid
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696.
Which one is a laevo - rotatory sugar
A
Sucrose
B
Glucose
C
Fructose
D
None of the above
Answer :
Fructose
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697.
Phase contrast microscope is
A
Base on the scattering of light and using a dark field condenser
B
used for the study of living cells
C
Related to retardation and thickness of object
D
The best method for studying non- living ultra structure
Answer :
used for the study of living cells
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698.
Ribosomes are produced in
A
nucleolus
B
cytoplasm
C
mitochondria
D
golgi body
Answer :
nucleolus
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699.
Wilkins X - ray diffraction showed the diameter of the DNA helix is
A
10 Å
B
20 Å
C
30 Å
D
40 Å
Answer :
20 Å
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700.
Semi autonomous cell organelles of cell are
A
Nucleus and chloroplast
B
Chloroplast and mitochondria
C
Vacuoles and golgi complex
D
Ribosome and lysosome
Answer :
Chloroplast and mitochondria
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