Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Molecular Basis of Inheritance question

2021 · Q52
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Molecular Basis of Inheritance
  5. /2021 · Q52

Molecular Basis of Inheritance question

2021 · Q52

NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
  1. A
    T : 20 ; G : 25 ; C : 25
  2. B
    T : 20 ; G : 30 ; C : 20
  3. C
    T : 20 ; G : 20 ; C : 30
  4. D
    T : 30 ; G : 20 ; C : 20
View written solutionFree

Correct answer: D

Chargaff rule - In DNA there is always equality in quantity between the bases A and T and between the bases G and C.

According to Chargaff's rule, for a double stranded DNA,

[A] = [T],

∵\because∵ [A] = 30%, ⇒\Rightarrow⇒ [T] = 30%

Since [C] = [G]

∴\therefore∴ 100 −-− [A + T]

= 100 −-− [30 + 30]

= 100 −-− 60 = 40%

and C = G = 20% each

∴\therefore∴ [A] = 30%

[T] = 30%

[G] = 20%

[C] = 20%

PreviousNext

More from Molecular Basis of Inheritance

  • Which of the following RNAs is not required for the synthesis of protein?2021 · MCQ
  • Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?2021 · MCQ
  • Which one of the following statements about histones is wrong?2021 · MCQ
  • Statement I : The codon 'AUG' codes for methionine and phenylalanine. Statement II : 'AAA' and 'AAG' both codons code for the amino acid lysine. In the light of the above statements, choose the correct answer from the options given below.2021 · MCQ
  • If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately2020 · MCQ
  • Which of the following statements is correct?2020 · MCQ
  • The first phase of translation is2020 · MCQ
  • Name the enzyme that facilitates opening of DNA helix during transcription.2020 · MCQ