Biomolecules  MCQs

MCQs of Biomolecules

Showing 151 to 160 out of 161 Questions
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151.
In nucleic acids, sugars are joined together by _____ ion.
(a) PO33-
(b) PO43-
(c) SO42-
(d) CO32-
Answer:

Option (b)

152.
What is called to the unit formed by the attachment of a base to first position of sugar ?
(a) Nucleoside
(b) Nucleotide
(c) Nucleic acid
(d) Dinucleotide
Answer:

Option (a)

153.
A unit formed by the attachment of a nucleoside to phosphate ion is called _____.
(a) nucleotide
(b) nucleotide
(c) polynucleotide
(d) dinucleoside
Answer:

Option (a)

154.
The molecular shape of DNA is like a _____.
(a) sand which
(b) triagonal pyramid
(c) twisted rope
(d) lock - key
Answer:

Option (c)

155.
Which of the following statement is wrong ?
(a) A and C are purine base.
(b) In DNA, A and T are joined to bases gether with two H-bonds.
(c) In RNA, A, g, C, and U bases are present.
(d) T and U are pyrimidine base.
Answer:

Option (a)

156.
The double helix structure of DNA is due to _____ .
(a) electrostaticforce
(b) van der Waals's force
(c) dipole - dipole interaction
(d) hydrogen band
Answer:

Option (d)

157.
Which base from the following is present only in RNA but not in DNA ?
(a) Uracil
(b) Cytosine
(c) Guanine
(d) Thymine
Answer:

Option (a)

158.
Which base present only in DNA but not in RNA ?
(a) Guanine
(b) Thymine
(c) Adenine
(d) Cytosine
Answer:

Option (b)

159.
In DNA if order of bases on one side of double helix structure of DNA, then what will be order of RNA on that side ?
(a) CCGUA
(b) GGCAU
(c) GGCTU
(d) CCGAU
Answer:

Option (a)

Showing 151 to 160 out of 161 Questions
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