221.
Nuclear membrane disappears in
A
Late prophase
B
Early prophase
C
Metaphase
D
Telophase
Answer :
Late prophase
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222.
Colchicine , a mitotic poison, arrests the cell division in
A
G1 - phase
B
G2 - phase
C
Anaphase
D
Metaphase
Answer :
Metaphase
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223.
How many chromosome shall be present in a diploid cell at mitotic Anaphase if its egg cell has ten chromosome
A
10 (Ten)
B
20 (Twenty )
C
30 (Thirty )
D
40 (Forty)
Answer :
40 (Forty)
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224.
V, J and L shaped chromosome occur in
A
Prophase
B
Anaphase
C
Metaphase
D
Telophase
Answer :
Anaphase
Discuss Question
Anaphase is best stage to study different shapes of the chromosome as centromere seperates moving chromatids to opposite poles.
225.
Movement against concentration gradient is called
A
Osmosis
B
active transport
C
Diffusion
D
Passive transport
Answer :
active transport
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226.
The complex formed by a pair of synapsed homologous chromosomes is called
A
Kinetochore
B
Bivalent
C
Axoneme
D
Equatorial plate
Answer :
Bivalent
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227.
Which one of the following statements is not true for meiosis
A
It occur in reproductive tissue only
B
Chromosome undergo pairing in early prophase -I
C
Chromosome donot exchange part
D
Chromosome do not divide during Anaphase -I
Answer :
Chromosome donot exchange part
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228.
Reason of chromosomal movement in Anaphase
A
Astral rays
B
Centrioles
C
Kinetochore
D
Kinetochoreand spindle fobres
Answer :
Kinetochoreand spindle fobres
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229.
How many types of spindles are forms during cell division in Eukaryotes
A
3
B
4
C
5
D
2
Answer :
3
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230.
Synapsis occurs in phase of meiosis
A
Zygotene
B
Diplotene
C
Pachytene
D
Leptotene
Answer :
Zygotene
Discuss Question
It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them.