1.

    DNA is denatured by

    A

    Heat

    B

    Acid

    C

    DNA polymerase

    D

    Both (a) and (b)

    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 denaturation, factors affecting DNA stability

    Related Questions

    1.

    The central dogma in molecular biology was proposed by?

    A

    Watson

    B

    Wilkins

    C

    Crick

    D

    Franklin

    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 :Central dogma of molecular biology, History of science

    2.

    Histones are crucial for DNA packaging. Which of the following is NOT a characteristic of these proteins?

    A

    Rich in basic amino acids

    B

    Positively charged

    C

    Primarily composed of carbohydrates

    D

    Synthesized mainly during S phase

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    PYQ YEAR: 2021
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :DNA packaging, Histones, Cell Cycle

    3.

    In DNA of certain organisms, guanine constitutes 20% of the bases. What percentage of the bases would be adenine?

    A

    0%

    B

    0.1

    C

    0.2

    D

    0.3

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

    4.

    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
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Histones, Amino acids, Protein structure, pH

    5.

    The length of DNA in bacteriophage Ο•imes174\phi imes 174

    A

    5386  bp5386\,\,bp

    B

    48502  bp48502\,\,bp

    C

    4.6imes106bp4.6 imes {10^6}bp

    D

    3.3imes109bp3.3 imes {10^9}bp

    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 length, bacteriophage genome

    6.

    Which of the following is NOT a component of a DNA nucleotide?

    A

    Deoxyribose sugar

    B

    Phosphate group

    C

    Nitrogenous base

    D

    Ribose sugar

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :0.5 mins
    πŸ”„Ncert Concepts :DNA, Nucleotides, Sugar

    7.

    If the length of DNA in a mammalian cell is about 2.2 meters and there are 6.6imes1096.6 imes 10^9 base pairs, what is the approximate distance between two consecutive base pairs?

    A

    0.34 nm

    B

    3.4 nm

    C

    34 nm

    D

    0.034 nm

    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

    8.

    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 :Viral genome, Single-stranded DNA

    9.

    A nucleoside is

    A

    Purine/pyrimidine+phosphate

    B

    Purine/pyrimidine+sugar

    C

    Pyrimidine+purine+phosphate

    D

    Purine+sugar+phosphate

    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 :Nucleoside, Purine, Pyrimidine, Sugar, Phosphate

    10.

    Antiparallel strands of a DNA molecule means that

    A

    One strand turns anti-clockwise

    B

    The phosphate groups of two DNA strands at their ends, share the same position

    C

    The phosphate groups at the start of two DNA strands are in opposite position(pole)

    D

    One strand turns clockwise

    Question Tags
    πŸ“š Subject:Botany
    πŸ“‘ Chapter:Molecular Basis of Inheritance
    🎯Topic:Dna
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :DNA structure, antiparallel strands, phosphate groups

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