421.
Mode of DNA replication in E. coli is
A
Conservative and unidirectional
B
Semi conservative and unidirectional
C
Conservative and bidirectional
D
Semi conservative and bidirectional
Answer :
Semi conservative and bidirectional
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422.
Secondary constriction - II of chromosome is generally concerned with the
A
Synthesis of r-RNA
B
Syntresis of t-RNA
C
Syntresis of m-RNA
D
All of the above
Answer :
Syntresis of t-RNA
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423.
R.N.A. contains which of the following base in place of Thymine of D.N.A
A
Thymine
B
Uracil
C
Adenine
D
None of the above
Answer :
Uracil
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424.
Which is non reducing sugar
A
Sucrose
B
Fructose
C
Galatose
D
Glucose
Answer :
Sucrose
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425.
What is true about ribosomes?
A
The prokaryotic ribosomes are $$80S,$$ where $$''S\,''$$ stands for sedimentation coefficient
B
These are composed of ribonucleic acid and proteins
C
These are found only in eukaryotic cells
D
These are self-splicing introns of some RNAs
Answer :
These are composed of ribonucleic acid and proteins
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426.
Histone occupies the major groove of a DNA at an angle of
A
60?
B
90?
C
45? to helix
D
30? to helix axis
Answer :
30? to helix axis
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427.
The function of rough endoplasmic reticulum is
A
fat synthesis
B
lipid synthesis
C
protein synthesis
D
steroid synthesis
Answer :
protein synthesis
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428.
Inside of cell as compared to outside
A
More sodium
B
More potassium
C
More Na and K
D
None of the above
Answer :
More potassium
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429.
Which is soluble RNA
A
HnRNA
B
RRNA
C
MRNA
D
TRNA
Answer :
TRNA
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430.
Which of the following is absent in animal cell
A
Cell wall and plamamemb
B
Mitochondria
C
Centrioles
D
Cell wall and chloroplast
Answer :
Cell wall and chloroplast
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