1.

    In eukaryotic DNA replication, which of the following is NOT a function of topoisomerase?

    A

    Relieving torsional stress

    B

    Preventing supercoiling

    C

    Untangling DNA strands

    D

    Synthesizing RNA primers

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :DNA Replication, Enzymes

    Related Questions

    1.

    A bacterial chromosome has 4.6imes1064.6 imes 10^6 base pairs. Calculate the approximate length of this chromosome in micrometers, given that the distance between base pairs is 0.34 nm.

    A

    1564 micrometers

    B

    1.564 micrometers

    C

    4.6 micrometers

    D

    0.34 micrometers

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2022
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :DNA Structure, Base Pairing, Unit Conversion

    2.

    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
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2022
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA Structure, Base Pairing

    3.

    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 β€…β€Š6.6  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
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :unit conversion, multiplication, scientific notation

    4.

    If the distance between two consecutive base pairs is 0.340.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6imes1096.6 imes 10^9 bp, then the length of the DNA is approximately:

    A

    2.2 m

    B

    2.0 m

    C

    2.5 m

    D

    1.8 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

    5.

    In a DNA molecule, the adenine is 15%. What will be the percentage of guanine in this DNA?

    A

    15%

    B

    35%

    C

    70%

    D

    30%

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA structure, base pairing rules, Chargaff's rules

    6.

    If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine, and Cytosine in it?

    A

    T=20%, G=20%, C=30%

    B

    T=30%, G=20%, C=20%

    C

    T=10%, G=30%, C=30%

    D

    T=30%, G=10%, C=30%

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2021
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA, Chargaff's Rule, Base Pairing

    7.

    All of the following are necessary characteristics of a molecule serving as genetic material EXCEPT its ability to:

    A

    Replicate accurately

    B

    Undergo mutations

    C

    Store information

    D

    Be transcribed or translated

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2016
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Genetics, DNA, RNA

    8.

    If two homologous chromosomes possess different alleles for eye color, what is the relationship between these chromosomes?

    A

    They are non-homologous chromosomes.

    B

    They are sister chromatids.

    C

    They are homologous chromosomes with different alleles for the eye color gene.

    D

    They are sex chromosomes.

    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 :1 mins
    πŸ”„Ncert Concepts :Genetics, Chromosomes, Homologous Chromosomes, Alleles

    9.

    If a viral genome consists of 5000 base pairs, what is its approximate length in nanometers, assuming a 0.34 nm distance between base pairs?

    A

    1700 nm

    B

    5000 nm

    C

    170 nm

    D

    500 nm

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2022
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA Structure, Base Pairing

    10.

    A bacterial strain has a mutation in the gene encoding DNA gyrase. Which antibiotic would likely be ineffective against this strain?

    A

    Penicillin

    B

    Tetracycline

    C

    Ciprofloxacin

    D

    Erythromycin

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :DNA Replication, Antibiotics, Bacterial Genetics

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