science
Grade-10
Easy

Question

Which base is obtained due to the deamination of adenine?

  1. Guanine.

  2. Cytosine.

  3. Uracil.

  4. Hypoxanthine.

hintHint:

A base not found in DNA or RNA.

The correct answer is:

Hypoxanthine.


    • Deamination refers to removal of amine group from a compound
    • Hypoxanthine has structure similar to adenine 
    • Adenine has amino group attached at 6th carbon atom while hypoxanthine has carbonyl group attached at the 6th carbon atom
    • The deamination in adenine is due to the removal of amino group at the 6th carbon of adenine 
    • The deamination of adenine to hypoxanthine: 

    • The reaction is mediated by deaminases
    • Adenine is a purine which is a two ringed structure

    Related Questions to study

    Grade-10
    science

    Congenital malformations are caused by which of the following mutagens?

    Congenital malformations are caused by which of the following mutagens?

    scienceGrade-10
    Grade-10
    science

    Damages and errors in the DNA can cause___________

    • Mutation can be beneficial or harmful depending upon the impact it has produced on the organism

    Damages and errors in the DNA can cause___________

    scienceGrade-10

    • Mutation can be beneficial or harmful depending upon the impact it has produced on the organism

    Grade-10
    science

    5-bromouracil is the analog of which base?

    • Base analogues are naturally occurring molecules having similar structure to common bases
    • 5BromoUracil and 2AminoPurine are common base analogues

    5-bromouracil is the analog of which base?

    scienceGrade-10

    • Base analogues are naturally occurring molecules having similar structure to common bases
    • 5BromoUracil and 2AminoPurine are common base analogues

    parallel
    Grade-10
    science

    Nitrous acid is a __________ agent.

    Nitrous acid also converts adenine to hypoxanthine and guanine to xanthine

    Nitrous acid is a __________ agent.

    scienceGrade-10

    Nitrous acid also converts adenine to hypoxanthine and guanine to xanthine

    Grade-10
    science

    DNA is sensitive to temperatures above _______.

    • PCR was discovered by Kary Mullis
    • Various forms of PCR are available which are all based on the basic three steps 
    • Besides replication, PCR can also be used in diagnosis, modification of genetic material, paternity testing and many more

    DNA is sensitive to temperatures above _______.

    scienceGrade-10

    • PCR was discovered by Kary Mullis
    • Various forms of PCR are available which are all based on the basic three steps 
    • Besides replication, PCR can also be used in diagnosis, modification of genetic material, paternity testing and many more

    Grade-10
    science

    Ionizing radiations include:

    • Mutagens are the factors that cause mutation
    • Physical mutagens include ionizing radiations, high concentration of carbon dioxide, etc

    Ionizing radiations include:

    scienceGrade-10

    • Mutagens are the factors that cause mutation
    • Physical mutagens include ionizing radiations, high concentration of carbon dioxide, etc

    parallel
    Grade-10
    science

    Generally, the mutations are:

    • In harmful mutation, due to insertion or deletion of a base the resulting protein synthesis become faulty
    • In silent mutation, the alteration in base sequence is such that the final protein is not changed

    Generally, the mutations are:

    scienceGrade-10

    • In harmful mutation, due to insertion or deletion of a base the resulting protein synthesis become faulty
    • In silent mutation, the alteration in base sequence is such that the final protein is not changed

    Grade-10
    science

    Which of the following base analogs exhibit tautomerism?

    • Base analogues have structure similar to the common bases (Adenine, guanine, cytosine and thymine)
    • 5bromouracil is the base analogue for thymine

    Which of the following base analogs exhibit tautomerism?

    scienceGrade-10

    • Base analogues have structure similar to the common bases (Adenine, guanine, cytosine and thymine)
    • 5bromouracil is the base analogue for thymine

    Grade-10
    science

    Point Mutation is caused by:

    • Point mutation can be caused due to substitution by a base analogue or due to exposure to ionizing radiations as well
    • Point mutation can also be due to deletion or insertion of a base pair

    Point Mutation is caused by:

    scienceGrade-10

    • Point mutation can be caused due to substitution by a base analogue or due to exposure to ionizing radiations as well
    • Point mutation can also be due to deletion or insertion of a base pair

    parallel
    Grade-10
    science

    Examples of base analogs are ________.

    • Base analogues are naturally occurring molecules having similar structure to common bases
    • 5BU has structure similar to thymine
    • 2aminopurine has structure similar to purine

    Examples of base analogs are ________.

    scienceGrade-10

    • Base analogues are naturally occurring molecules having similar structure to common bases
    • 5BU has structure similar to thymine
    • 2aminopurine has structure similar to purine

    Grade-10
    science

    Alkyl bases are induced in DNA by which chemical mutagen?

    • The alkylating agents helps in crosslinking of DNA which cannot replicate 
    • Other mechanism is by replacing hydrogen atoms of DNA with alkyl groups which cannot be repaired by the cell

    Alkyl bases are induced in DNA by which chemical mutagen?

    scienceGrade-10

    • The alkylating agents helps in crosslinking of DNA which cannot replicate 
    • Other mechanism is by replacing hydrogen atoms of DNA with alkyl groups which cannot be repaired by the cell

    Grade-10
    science

    Base analogs are which type of mutagens?

    • Bases are classified into purine and pyrimidine
    • Purine include adenine and guanine which are two ringed structures
    • Pyrimidine include thymine and uracil which are single ringed structures

    Base analogs are which type of mutagens?

    scienceGrade-10

    • Bases are classified into purine and pyrimidine
    • Purine include adenine and guanine which are two ringed structures
    • Pyrimidine include thymine and uracil which are single ringed structures

    parallel
    Grade-10
    science

    Ionizing radiation causes ___________.

    • Ionizing radiations have shorter wavelength but high energy
    • Ionizing radiations cause single strand break or crosslinking

    Ionizing radiation causes ___________.

    scienceGrade-10

    • Ionizing radiations have shorter wavelength but high energy
    • Ionizing radiations cause single strand break or crosslinking

    Grade-10
    science

    If the mutation occurs in the non-functional part of DNA, then these mutations may remain as _________.

    • Silent mutation does not affect the individual since the change in the nucleic acid sequence doe not alter the amino acid produced.

    If the mutation occurs in the non-functional part of DNA, then these mutations may remain as _________.

    scienceGrade-10

    • Silent mutation does not affect the individual since the change in the nucleic acid sequence doe not alter the amino acid produced.

    Grade-10
    science

    Mutations are mainly responsible for:

    • Not all mutations are harmful
    • Some mutations are silent, having no effect
    • Development of lactose tolerance is an example for beneficial mutation

    Mutations are mainly responsible for:

    scienceGrade-10

    • Not all mutations are harmful
    • Some mutations are silent, having no effect
    • Development of lactose tolerance is an example for beneficial mutation

    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.