571. Cell wall is made up of

A Several layers of microfibils
B Several micellae
C Cellulosemolecules
D Glucosemolecule
Answer :   Several layers of microfibils
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572. The site for protein synthesis is

A Ribosome
B DNA
C Nucleus
D Mitochondria
Answer :   Ribosome
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573. Water is important for the body of animals in

A Reproduction
B Keeping the body cooled
C Working as solvent
D All of the above
Answer :   Working as solvent
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574. Diploid number of chromosomes in Man , Black molish and Privet Hedge is

A 44
B 48
C 46
D 42
Answer :   46
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575. The contribution of cytoplasmic DNA in the total

A 90-99%
B 65-75%
C 5-15%
D 1-5%
Answer :   1-5%
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576. Retrovirus have genetic material

A DNA only
B RNA only
C DNA or RNA only
D None of the above
Answer :   RNA only
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577. Which ion holds the ribosomal subunits togeter

A Ca+2
B Mn+2
C Mg+2
D Na+
Answer :   Mg+2
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578. Molecular biology is the study of

A Structure function and cell reproduction
B physio biochemical studies of biomolecules
C Studying tissues under microscope
D Metabolid activity of life
Answer :   physio biochemical studies of biomolecules
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579. The back bone of RNA is consists of which of the following sugar

A Deoxyribonse
B Ribose
C Sucrose
D Maltose
Answer :   Ribose
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580. In salivary gland chromosomes/polytene chromosomes, pairing is

A absent
B occasional
C formed between nonhomologous chromosomes
D formed between homologous chromosomes
Answer :   formed between homologous chromosomes
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