161.
Lampbrush chromosomes occur during
A
prophase of mitosis
B
diplotene of meiosis
C
metaphase of meiosis
D
interphase
Answer :
diplotene of meiosis
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162.
The synaptonemal complex appeare
A
Between homologous chromosomes
B
In zygotene stage
C
Composed of DAN + protein
D
All of the above
Answer :
All of the above
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163.
Which of the following not occurs in Anaphase-I but occurs in Anaphase-II
A
Condensation of chromosomes
B
Poleward movement of chromosomes
C
Contraction of spindle fibers
D
Splitting of centromer
Answer :
Splitting of centromer
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164.
The longest phase of meiosis (I) is
A
Metaphase I
B
prophase I
C
Anaphase I
D
Telophase I
Answer :
prophase I
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165.
Significance of meiosis lies in
A
Reduction of chromosome number to one half
B
Maintaning constancy of chromosome number during sexual reproduction
C
Production of genetic variability
D
All of the above
Answer :
All of the above
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166.
Actin fibre is present in
A
Cilia
B
Flagella
C
Carbohydrates
D
Microfilaments
Answer :
Microfilaments
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167.
The exchange of genetic material between chromatids of paired homologous chromo- somes during first meiotic division is called
A
transformation
B
chiasmata
C
crossing over
D
synapsis
Answer :
crossing over
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168.
Which one is present in both prokaryotic and eukaryotic cell
A
Ribosome
B
Mitochondria
C
ER
D
Nucleus
Answer :
Ribosome
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prokaryotes like bacteria have only non memberous cell organelles ribosome for protein synthesis
169.
Spindle fibres attach on to
A
Telomere of the chromosome
B
Kinetochore of the chromosome
C
Centromere of the chromosome
D
Kinetosome of the chromosome
Answer :
Kinetochore of the chromosome
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170.
How many mitotic divisions are needed for a single cell to make 128 cells?
A
7
B
14
C
28
D
64
Answer :
7
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