The monomer of nucleic acid is

(1)nucleotides

(2)nucleosides

(3)nucleus

(4)Both 1 and 2 

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Which of the following are the components of nucleotides

(A)Heterocyclic nitrogenous bases, monosaccharides, phosphoric acid

(B)Homocyclic nitrogenous bases, monosaccharides, phosphoric acid

(C)Heterocyclic nitrogenous bases, Disaccharides, phosphoric acid

(D)Heterocyclic nitrogenous bases, Polysaccharides, phosphoric acid

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How many types of nitrogenous bases are present in nucleic acid

(A)4

(B)3

(C)5

(D)6

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How many of the following are purines?

Adenine, Uracil, Cytosine, thymine, Cysteine, threonine, Tryptophan, Guanine, Thymine

(A)5

(B)4

(C)2

(D)3

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How many of the following are pyrimidines?

Adenine, Uracil, Cytosine, Cysteine, threonine, Trytophan, Guanine, Thymine

(A)5

(B)4

(C)2

(D)3

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Which of the following is true about sugar of RNA

(A)Ribose sugar is present

(B)2’deoxyribose sugar is present

(C)5C sugar is present

(D)All is true except (B)

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Which of the following is true about sugar of DNA

(A)Ribose sugar is present

(B)2’deoxyribose sugar is present

(C)4C sugar is present

(D)Both B and C

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The negative charge on DNA is because of the presence of ________in nucleotides

(A)phosphate

(B)sugar

(C)Nitrogenous bases

(D)All of the above

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The number of cyclic rings present in purines and pyrimidines are

(A)2,1 respectively

(B)1,2 respectively

(C)2,2 respectively

(D)1,1 respectively

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In proteins, amino acids are linked by  a type of

(A)Acetyl bond

(B)Amide bond

(C)Ester bond

(D)Glycosidic bond

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