331.
Centrosome is not present in
A
Cell of higher plants
B
Cells of lower plants
C
Cells of higher animals
D
Cells of lower animals
Answer :
Cell of higher plants
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332.
During mitosis ER and nucleolus begin to disappear at:
A
late prophase
B
early metaphase
C
late metaphase
D
early prophase
Answer :
early prophase
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333.
In meiosis
A
Division of nucleus twice but replication of DNA only once
B
Division of nucleus twice and replication of DNA twice
C
Division of nucleus once and replication of DNA is also once
D
Division of nucleus once and DNA - replication is twice
Answer :
Division of nucleus twice but replication of DNA only once
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334.
The metabolism of cell which decrease during porphase again starts increasing during
A
Telophse
B
Anaphase
C
Metaphase
D
G1 - phase
Answer :
Telophse
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335.
Nuclear envelope reappears at
A
Metaphase
B
Prophase
C
Anaphase
D
Telophase
Answer :
Telophase
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336.
Which statement is true for mitosis
A
Daughter cells exhibit division of labour i. e. perform different functions
B
Daughter cells are exactly similar is all respect
C
Daughter cells have half the number of chromosomes as compared to mother cell
D
Daughter cells have differences in genetic characters
Answer :
Daughter cells are exactly similar is all respect
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Mitosis is a equational division where there is no variation and daughter cells are identical.
337.
Colchicine (C22H25O6N) which prevents spindle formation is chemically a
A
Protein
B
Amino acid
C
Alkaloid
D
Glycolipid
Answer :
Alkaloid
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338.
Who coined the name " Amitosis"
A
Farmer
B
Remac
C
Strass burger
D
A. Flemming
Answer :
Remac
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339.
Which can be observed in an interphase nucleus under the light microscope
A
Chromosomes
B
Nucleosomes
C
Centromere
D
Heterochromatin
Answer :
Heterochromatin
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340.
When pairing occurs in chromosomes (meiosis)
A
Leptotene
B
Zygotene
C
Pachytene
D
Diakinesis
Answer :
Zygotene
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