81.
Division of cell without recognisable chromosomes is
A
Amitosis
B
Mitosis
C
Meiosis - I
D
Meiosis - II
Answer :
Amitosis
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82.
Meiosis not occurs in
A
Ovule
B
Anther
C
Microsporangia
D
Stoot tip
Answer :
Stoot tip
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83.
Which chromosome may lost during cell division
A
Giant chromosome
B
Acentric chromosome
C
Polycentric chromosome
D
Telocentric chromosome
Answer :
Acentric chromosome
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84.
Synthesis of proteins for formation of spindle fibres takes place in
A
G1-phase
B
S-phase
C
G2-phase
D
M-phase
Answer :
G2-phase
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85.
The cell wall of spirogyra is made up of
A
Cellulose
B
Suberiun
C
Lignin
D
Chitin
Answer :
Cellulose
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86.
Pairing of homologous chromosomes takes place in
A
Pachytene
B
Zygotene
C
Diplotene
D
None of the above
Answer :
Zygotene
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87.
Genes are present on : How is the DNA accommodated
A
Chromosomes
B
Lamellae
C
Plasma membrane
D
Mesosomes
Answer :
Chromosomes
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88.
Function of mitochondria is
A
Excretion
B
Respiration
C
Digestion
D
Excretion and respiration
Answer :
Respiration
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89.
Synapsis occurs between:
A
mRNA and ribosomes
B
spindle fibres and centromere
C
two homologous chromosomes
D
a male and a female gamete
Answer :
two homologous chromosomes
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90.
Which element helps in spindle formation
A
Mn
B
Co
C
Pb
D
Ag
Answer :
Mn
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