651. Degeneracy of genetic code was discover by

A Mc Clintock
B Khorana
C Ochoa
D Lymphatic circulation
Answer :   Lymphatic circulation
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652. If base order in one chain of DNA is "ATCGA" then how many no. of H- bond found in DNA duplex

A 20
B 12
C 10
D 11
Answer :   12
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653. The formation of protein can be considered as

A Dehydration synthesis
B Dehydration analysis
C Hydration synthesis
D Hydration analysis
Answer :   Dehydration synthesis
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654. Nucleolus in Eukaryotic cell is

A Nonliving
B Visble at Metaphase
C Bounded by membrane
D The site of packaging of r-RNA with proteins
Answer :   The site of packaging of r-RNA with proteins
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655. " Durs" are

A Crystals of calcium carbonate
B Crystals of calcium oxalate
C Alkaloids
D Crytals of silica
Answer :   Crystals of calcium oxalate
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656. Aerobic respiration is performed by

A Mitochondria
B Chloroplast
C Ribosome
D Golgibody
Answer :   Mitochondria
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657. Number of chiral carbons in β - D - (+) - glucose is

A Five
B Six
C Three
D Four
Answer :   Five
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658. Which sugar does not give Benedict's test

A Glucose
B Multose
C Fructose
D Sucrose
Answer :   Sucrose
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659. Among the following examples which is a monosaccharide

A Glucose
B Maltose
C Sucrose
D Raffinose
Answer :   Glucose
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660. Selective permeabilty occurs in

A Cell wall
B Plasma membarne
C Cytoplasm
D None of the above
Answer :   Plasma membarne
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