Statement (1) is correct because DNA is the genetic material in almost all organisms (except some viruses where RNA acts as genetic material).
Statement (2) is incorrect. Although the DNA backbone is made of sugar and phosphate, the nitrogenous bases are not projected outside; they are oriented towards the interior of the double helix, where they pair with complementary bases through hydrogen bonds.
Statement (3) is correct because transcription also follows the principle of complementarity, where RNA nucleotides pair with the DNA template strand (A–U, G–C).
Statement (4) is correct as a significant portion of the human genome consists of repetitive DNA sequences.
A polynucleotide chain is shown in the figure. Identify X and Y (types of bond)
MediumWhich of the following statements are correct ? (A) In double helix model of DNA, two chains have pa
EasyAccording to the Watson-Crick model of DNA, the two polynucleotide chains have;
MediumGiven below are some steps of transcription : A. RNA Polymerase uses nucleotide triphosphates as sub
MediumWhen DNA replication starts :
MediumWhich of the following is a primer dependent enzyme :-
Practice Botany Exams
Full-length mock tests with detailed analytics, rank, and percentile.
Browse Exams