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Biomolecules MCQs | Biomolecules Short Questions with Answers

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Free download in PDF Biomolecules Short Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) The type of sugar in DNA are

[A] triose
[B] tetrose
[C] pentose
[D] hexose
Answer: pentose
(2) The width of DNA molecule is
[A] 15 Ao
[B] 3.4 Ao
[C] 20 Ao
[D] 25 Ao
Answer: 20 Ao
(3) The length of DNA having 23 base pairs is
[A] 78 Ao
[B] 78.4 Ao
[C] 78.2 Ao
[D] 74.8 Ao
Answer: 74.8 Ao
(4) Left handed DNA
[A] A-DNA
[B] B-DNA
[C] Z-DNA
[D] C-DNA
Answer: Z-DNA
(5) Z-DNA have a
[A] Double helical nature
[B] Zig-Zag apperarance
[C] uracil base
[D] single stranded nature
Answer: Zig-Zag apperarance
(6) A short length of DNA molecule has 80 thymine and 80 guanine bases. The total number of nucleotide in the DNA fragment is
[A] 160
[B] 40
[C] 320
[D] 640
Answer: 320
(7) RNA is the genetic material in
[A] Viruses only
[B] In some viruses and some prokaryotes
[C] In some viruses and some prokaryotes and rarely in eukaryotes
[D] Only in some viruses
Answer: Only in some viruses
(8) RNA is

[A] Single stranded
[B] Double stranded
[C] Triple stranded
[D] Both a and b
Answer: Single stranded
(9) The sugar in RNA is
[A] Deoxyribose
[B] Ribose
[C] Hexose
[D] Fructose
Answer: Ribose
(10) Nucleotides in RNA are joined by
[A] 3’5’ phosphodiester bond
[B] 3’4’ phosphodiester bond
[C] 3’2’ phosphodiester bond
[D] 3’6’ phosphodiester bond
Answer: 3’5’ phosphodiester bond
(11) Thymine in DNA is replaced by
[A] Guanine in RNA
[B] Adenine in RNA
[C] Cytosine in RNA
[D] Uracil in RNA
Answer: Uracil in RNA
(12) The most abundant type of RNA in the cell is
[A] rRNA
[B] mRNA
[C] tRNA
[D] hnRNA
Answer: rRNA
(13) Which of the following RNA serves as adaptor molecule during protein synthesis
[A] rRNA
[B] mRNA
[C] tRNA
[D] hnRNA
Answer: tRNA
(14) rRNA is synthesised in
[A] nucleus
[B] Cytoplasm
[C] RER
[D] Nucleolus
Answer: Nucleolus
(15) cDNA is
[A] complementary to mRNA
[B] complementary to rRNA
[C] complementary to tRNA
[D] complementary to hnRNA
Answer: complementary to mRNA
(16) Amino acids are attached to the
[A] acceptor arm of tRNA
[B] anti-codon arm of tRNA
[C] codon arm of tRNA
[D] none of these
Answer: acceptor arm of tRNA
(17) Ribozymes are
[A] enzymes with catalytic activity
[B] RNAs with catalytic activity
[C] proteins with catalytic activity
[D] nucleic acids with catalytic activity
Answer: RNAs with catalytic activity
(18) RNA is primarily seen in
[A] nucleus
[B] Cytoplasm
[C] RER
[D] SER
Answer: Cytoplasm
(19) Ribose sugar in RNA is
[A] D-ribose
[B] L-ribose
[C] Both L and D form
[D] None of these
Answer: D-ribose
(20) Which of the virus has double stranded RNA as genetic material?
[A] Tobacco mosaic virus
[B] Influenza virus
[C] Rous Sarcoma virus
[D] Reoviruses
Answer: Reoviruses

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