CBSE
Multiple Choice QuestionsThe chemical nature of chromatin is as follows
nucleic acids
nucleic acid and histone proteins
nucleic acids, histone and non-histone proteins
nucleic acids and non-histone proteins
Which one of the following triplet codon is a chain termination codon?
UGU
AAU
UUG
UAG
DNA sequences that code for protein are known as
introns
exons
control regions
intervening sequences
Melting of DNA at an elevated temperature (70°C) is primarily due to the breakdown of
phosphodiester bonds
glycosidic bonds
disulphide bonds
hydrogen bonds
What will be the codons in mRNA if the DNA codes are ATG - CAG?
TAC - GTC
UAC - GUC
UCA - TUA
TCA - GTC
Structural element of chromatin is
histone
acid protein and DNA
nuclear matrix
nucleosomes
Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called
tautomerisational mutation
analogue substitution
point mutation
frameshift mutation
Which one of the following triplet codon is known as initiation codon?
UUU
UAA
AUG
UGA
Short Answer TypeWhat is ribozyme?
Multiple Choice QuestionsA-DNA is
left-handed helix with 12 nucleotide pairs per turn
right-handed helix with 11 nucleotide pairs per turn
right handed helix with 12 nucleotide pairs per turn
left-handed helix with 11 nucleotide pairs per tum
