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
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Hard
    âš¡ Time Required :1 mins
    🔄Ncert Concepts :Mutations, Genetic Code

    Related Questions

    1.

    A molecule that can act as a genetic material must fulfill the traits given, except

    A

    it should provide the scope for slow changes that are required for evolution

    B

    it should be able to express itself in the form of ‘Mendelian characters’

    C

    it should be able to generate its replica

    D

    it should be unstable structurally and chemically

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :Genetic Material, Characteristics of Genetic Material, Evolution, Replication, Mendelian Inheritance

    2.

    Statement 1: Mitochondrial DNA is similar to prokaryotic DNA

    Statement 2: Mitochondria are through to have evolved from the prokaryotes

    A

    Statement 1 is True; Statement 2 is True; Statement 2 is correct explanation for Statement 1

    B

    Statement 1 is True; Statement 2 is True; Statement 2 is not correct explanation for Statement 1

    C

    Statement 1 is True, Statement 2 is False

    D

    Statement 1 is False, Statement 2 is True

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :Mitochondrial DNA, Prokaryotic DNA, Endosymbiotic Theory, Evolution

    3.

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

    A

    0

    B

    1 per base pair

    C

    2 per base pair

    D

    Equal to the number of base pairs

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA structure, ester bonds, B-DNA

    4.

    Read the following statements and state them as true (T) and False(F) A) DNA and RNA function as genetic material B) Nucleic acids are monomers of nucleotides. C) Adenine, Guanine, Cytosine, Uracil and Thymine are nitrogenous bases. Choose the correct option

    A

    A-T, B-F, C-T

    B

    A-F, B-T, C-T

    C

    A-T, B-T, C-F

    D

    A-F, B-F, C-T

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA, RNA, Nucleic Acids, Nucleotides, Nitrogenous Bases

    5.

    If a length of DNA has 45,000 base pairs, how many complete turns will the DNA molecule takes?

    A

    4,500

    B

    45,000

    C

    45

    D

    450

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA structure, base pairs, turns

    6.

    Which of the following is not relevant to the structure of double helical DNA?

    A

    Deoxyribose sugar

    B

    Nitrogenous bases

    C

    Hydrogen bonds

    D

    Ribose sugar

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA structure, double helix, nucleotide, deoxyribose, phosphate

    7.

    Which one of the following statements about Histones is wrong?

    A

    Histones are positively charged proteins.

    B

    Histones help in packaging of DNA in eukaryotes.

    C

    There are five main types of histones.

    D

    Histones are found in prokaryotic cells.

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :Histones, Amino acids, Protein structure, pH

    8.

    If the length of a DNA molecule is 1.1 meters, approximately how many base pairs does it contain?

    A

    3.2 x 106

    B

    3.2 x 109

    C

    1.1 x 109

    D

    0.34 x 109

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2022
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA Structure, Base Pairing

    9.

    If the distance between two consecutive base pairs is 0.34 nm{\rm{0}}{\rm{.34}}\,{\rm{nm}} and the total number of base pairs of a DNA double helix in a typical mammalian cell is   6.6  imes  109 bp\;6.6\,\, imes \,\,{10^9}\,bp then the length of the DNA is approximately

    A

    2.0{\rm{2}}{\rm{.0}} meters

    B

    2.5{\rm{2}}{\rm{.5}} meters

    C

    2.2{\rm{2}}{\rm{.2}} meters

    D

    2.7{\rm{2}}{\rm{.7}} meters

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :unit conversion, multiplication, scientific notation

    10.

    Which of the following is not relevant to the structure of double helical DNA?

    A

    Hydrogen bonds

    B

    Phosphodiester bonds

    C

    Base stacking interactions

    D

    Peptide bonds

    Question Tags
    📚 Subject:Botany
    📑 Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    âš¡ Time Required :2 mins
    🔄Ncert Concepts :DNA structure, double helix, nucleotide, deoxyribose, phosphate

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