1.

    The backbone of a polynucleotide chain is formed due to?

    A

    Sugar

    B

    Phosphate

    C

    Nitrogen base

    D

    Both 1 and 2

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :polynucleotide structure, sugar-phosphate backbone, biochemistry

    Related Questions

    1.

    A mutation changes a codon from UCG to UAG. This mutation is a:

    A

    Missense mutation

    B

    Silent mutation

    C

    Frameshift mutation

    D

    Nonsense mutation

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Mutations, Genetic Code

    2.

    SS DNA is present in?

    A

    TMV

    B

    Polio Virus

    C

    Pox Virus

    D

    Ο•imes174\phi imes 174 bacteriophage

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Single-stranded DNA, Virus Structure

    3.

    The number of bpbp in each turn of B-DNA helix is?

    A

    1

    B

    10

    C

    20

    D

    5

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :B-DNA structure, base pairs, helix turn

    4.

    Identify the purine bases common to both DNA and RNA molecules.

    A

    Adenine and Guanine

    B

    Cytosine and Thymine

    C

    Adenine and Cytosine

    D

    Guanine and Thymine

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2019
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Nitrogenous bases, Purines, DNA, RNA

    5.

    The bond which connects a nitrogenous base with deoxyribose sugar in a nucleotide of DNA molecule is

    A

    Hydrogen bond

    B

    Glycosidic bond

    C

    Ester bond

    D

    Phosphodiester bond

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Nucleotide structure, Glycosidic bond

    6.

    Which of the following is structural subunit of DNA?

    A

    Protein

    B

    Carbohydrate

    C

    RNA

    D

    Nucleotides

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :DNA structure, Nucleotides

    7.

    Which sugar is present in nucleic acid?

    A

    Pentose

    B

    Hexose

    C

    Fructose

    D

    Glucose

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :nucleic acids, monosaccharides, pentose, hexose

    8.

    If the total number of base pairs in a human DNA is 6.6imes1096.6 imes 10^9 bp and each base pair extends for 0.340.34 nm, what would be the approximate length of the DNA if it were stretched out?

    A

    2.2 m

    B

    0.22 m

    C

    22 m

    D

    220 m

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA structure, unit conversion

    9.

    If a DNA sequence is same as that of a mRNA copy that is translated into protein, it is called

    A

    Sense

    B

    Antisense

    C

    Intron

    D

    Exon

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :DNA, mRNA, sense strand, antisense strand, gene expression

    10.

    Number of ester bonds in a helics of B-DNA?

    A

    16

    B

    20

    C

    18

    D

    9

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA structure, ester bonds, B-DNA

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