Class 12 Chemistry Chapter 14 Biomolecules MCQs | Class 12 Chemistry Chapter 14 Biomolecules Short Questions with Answers

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Questions
1 The type of sugar in DNA are

sugar

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

rna

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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