741.
Mitochondrial cristae are sites of A
breakdown of macromolecules
B
protein synthesis
C
phosphorylation of flavoproteins
D
oxidation-reduction reactions
Answer :
oxidation-reduction reactions
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742.
The direction of D.N.A. replications is A
From 5’ end towards 3’ end
B
From 3’ end towards 5’ end
C
Amino terminus to carboxy terminus
D
Carboxy terminus to amino terminus
Answer :
From 5’ end towards 3’ end
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743.
Which of the following diasaccharide gives two molecules of glucose on hydrolysis A
Maltose
B
Lactose
C
A and B both
D
Sucrose
Answer :
Maltose
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744.
In DNA purine nitrogen bases are A
Uracil and Guanine
B
Guanine and Adenine
C
Adenine and cytosine
D
None of the above
Answer :
Guanine and Adenine
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745.
Knife of DNA is A
DNA ligase
B
Restriction endonuclease
C
Exonuclease
D
Peptidase
Answer :
Restriction endonuclease
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746.
Long chain molecuels of fattey acids are formed A
Polymerisation of 2 carbon compounds
B
Decoposition of fats
C
Polymeristaion of glycogen
D
Conversion of glycogen
Answer :
Polymerisation of 2 carbon compounds
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747.
64Codons contitute gentic code because A
There was 64 types of amino acid
B
64 types of t-RNA
C
Genetic code is triplet
D
There are 64 enzymes
Answer :
Genetic code is triplet
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748.
Light compound microscope with 15 x eye piece lense and 45 x objective lense will have a magnification of A
2000
B
675
C
1000
D
500
Answer :
675
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749.
Cellular organelles with membranes are : A
chormosomes, ribosomes and endoplasmic reticulum
B
endoplasmic reticulum, ribosomes and nuclei
C
lysosomes, Golgi apparatus and mitochondria
D
nuclei, ribosomes and mitochondria
Answer :
lysosomes, Golgi apparatus and mitochondria
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750.
During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called A
CAAT box
B
CGTT box
C
AAAT box
D
TATA box
Answer :
TATA box
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