If there are 10,000 nitrogenous base pairs in B-DNA then its length will be
(A)340nm
(B)3400nm
(C)34000nm
(D)340000nm

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Which of the following is not a polymer?
(A)Nucleic acid
(B)proteins
(C)lipids
(D)Carbohydrates

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Cytidine is a
(A)nucleoside
(B)nitrogen base
(C)nucleotide
(D)nucleic acid

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In rRNA, thymine pairs with 

(A)adenine
(B)uracil
(C)both A and B
(D)None of these

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Which one of the following nucleotide sequences contains only 4 pyrimidine bases?
(A)UAGCGGUAA
(B)TGCCTAACG
(C)GATCAATGC
(D)GCUAGACAA

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New strands of DNA are formed only in
(A)5’→3’ direction
(B)3’→5’ direction
(C)In both directions
(D)There is no specific polarity

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Gene expression results in
(A)DNA replication
(B)Polypeptide formation
(C)m-RNA formation
(D)Protein duplication

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Regulation of gene expression in eukaryotes cannot take place at
(A)primary transcript level
(B)splicing level
(C)transport of m-RNA from nucleus to cytoplasm
(D)replication level

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In E.coli the conversion off lactose in galactose and glucose takes place by
(A)Beta-galactokinase
(B) Beta-guluctosidase
(C) Beta-galactosidase
(D) Beta-lactosidase

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The conditions which regulate the expression of genes are
(A)Environmental
(B)Physiological
(C)Metabolic
(D)All of the above

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