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    science
    Grade-10
    Easy

    Question

    Mutagens can be___________.

    1. Chemical agent.

    2. Physical agent.

    3. Biological agent

    4. All of the above.

    Hint:

    Common examples of mutagens include X-rays, ethidium bromide and bacteria.

    The correct answer is:

    All of the above.

      • Mutation is an irreversible change in the sequence of nucleotides of a DNA
      • Mutation is caused due to error in cell division or due to environmental factors called mutagens
      • Mutagens can be classified as follows:
      1. Physical mutagens: Exposure to ionizing radiations, higher temperature, increased carbon dioxide concentration, etc
      2. Chemical mutagens: Chemicals like alkylating agents, hydroxylating agents, etc
      3. Biological mutagens: Infectious agents like bacteria, viruses, transposons 

      Related Questions to study

      Grade-10
      science

      Biological mutagens include:

      1. Viruses.

      2. Bacteria.

      3. Transposons.

      4. All of the above.

      Biological mutagens include:

      scienceGrade-10

      1. Viruses.

      2. Bacteria.

      3. Transposons.

      4. All of the above.

      Grade-10
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      Intercalating agents cause which type of mutations in the DNA.

      1. Frameshift mutation.

      2. Point mutation.

      3. Translocation mutation.

      4. None of the above.

      Intercalating agents cause which type of mutations in the DNA.

      scienceGrade-10

      1. Frameshift mutation.

      2. Point mutation.

      3. Translocation mutation.

      4. None of the above.

      Grade-10
      science

      In the following compound which, is one of the intercalating agents?

      1. Ethidium bromide

      2. 5-bromouracil

      3. Purine

      4. Clastogen 

      In the following compound which, is one of the intercalating agents?

      scienceGrade-10

      1. Ethidium bromide

      2. 5-bromouracil

      3. Purine

      4. Clastogen 

      parallel
      Grade-10
      science

      Which chemical mutagens add an OH-group to DNA base pairs?

      1. Hydroxylating agents.

      2. Deaminating agents.

      3. Alkylating agents.

      4. All of the above.

      Which chemical mutagens add an OH-group to DNA base pairs?

      scienceGrade-10

      1. Hydroxylating agents.

      2. Deaminating agents.

      3. Alkylating agents.

      4. All of the above.

      Grade-10
      science

      Which base is obtained due to the deamination of adenine?

      1. Guanine.

      2. Cytosine.

      3. Uracil.

      4. Hypoxanthine.

      Which base is obtained due to the deamination of adenine?

      scienceGrade-10

      1. Guanine.

      2. Cytosine.

      3. Uracil.

      4. Hypoxanthine.

      Grade-10
      science

      Congenital malformations are caused by which of the following mutagens?

      1. Carcinogens.
      2. Teratogens.
      3. Clastogens.
      4. None of the above.

      Congenital malformations are caused by which of the following mutagens?

      scienceGrade-10
      1. Carcinogens.
      2. Teratogens.
      3. Clastogens.
      4. None of the above.
      parallel
      Grade-10
      science

      Damages and errors in the DNA can cause___________

      1. Mutation

      2. DNA repair

      3. Translation

      4. Transcription

      Damages and errors in the DNA can cause___________

      scienceGrade-10

      1. Mutation

      2. DNA repair

      3. Translation

      4. Transcription

      Grade-10
      science

      5-bromouracil is the analog of which base?

      1. Thymine

      2. Guanine

      3. Cytosine

      4. Uracil

      5-bromouracil is the analog of which base?

      scienceGrade-10

      1. Thymine

      2. Guanine

      3. Cytosine

      4. Uracil

      Grade-10
      science

      Nitrous acid is a __________ agent.

      1. Alkylating agent.

      2. Deaminating agent.

      3. Hydroxylating agent.

      4. None of the above

      Nitrous acid is a __________ agent.

      scienceGrade-10

      1. Alkylating agent.

      2. Deaminating agent.

      3. Hydroxylating agent.

      4. None of the above

      parallel
      Grade-10
      science

      DNA is sensitive to temperatures above _______.

      1. 90o C.

      2. 85o C.

      3. 95o C.

      4. 80o C.

      DNA is sensitive to temperatures above _______.

      scienceGrade-10

      1. 90o C.

      2. 85o C.

      3. 95o C.

      4. 80o C.

      Grade-10
      science

      Ionizing radiations include:

      1. X- rays.

      2. Alpha rays.

      3. Gamma rays.

      4. All of the above.

      Ionizing radiations include:

      scienceGrade-10

      1. X- rays.

      2. Alpha rays.

      3. Gamma rays.

      4. All of the above.

      Grade-10
      science

      Generally, the mutations are:

      1. Harmful.

      2. Dominant.

      3. Recessive.

      4. Useful.

      Generally, the mutations are:

      scienceGrade-10

      1. Harmful.

      2. Dominant.

      3. Recessive.

      4. Useful.

      parallel
      Grade-10
      science

      Which of the following base analogs exhibit tautomerism?

      1. 5-bromouracil.

      2.  2-aminopurine.

      3.  6-mercaptopurine.

      4. Acycloguanosine

      Which of the following base analogs exhibit tautomerism?

      scienceGrade-10

      1. 5-bromouracil.

      2.  2-aminopurine.

      3.  6-mercaptopurine.

      4. Acycloguanosine
      Grade-10
      science

      Point Mutation is caused by:

      1. Base analogs.

      2. Alkylating agents.

      3. Hydroxylating agents.

      4. Metal ions.

      Point Mutation is caused by:

      scienceGrade-10

      1. Base analogs.

      2. Alkylating agents.

      3. Hydroxylating agents.

      4. Metal ions.

      Grade-10
      science

      Examples of base analogs are ________.

      1. Ethidium bromide.

      2. Acridine dyes.

      3. Mustard gas.

      4. 5-Bromouracil.

      Examples of base analogs are ________.

      scienceGrade-10

      1. Ethidium bromide.

      2. Acridine dyes.

      3. Mustard gas.

      4. 5-Bromouracil.

      parallel

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