Multiple Choice QuestionsBalbiani rings are the sites of
DNA replication
RNA and protein synthesis
synthesis of lipids
synthesis of polysaccharides
Which of the following is structural subunit of DNA?
Protein
Carbohydrate
RNA
Nucleotide
D.
Nucleotide
Nucleotides are the single units that make up nucleic acids like RNA and DNA, they are building blocks of life. Each nucleotide contains three items :
(i) A heterocyclic nucleobase (purines or pyrimidines).
(ii) A pentose sugar (ribose for RNA, deoxyribose for DNA).
(iii) A monophosphate, diphosphate or triphosphate.
DNA sequences that code for protein are known as
introns
exons
control regions
intervening sequences
Short Answer TypeMultiple Choice QuestionsOut 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
The 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
What will be the codons in mRNA if the DNA codes are ATG - CAG?
TAC - GTC
UAC - GUC
UCA - TUA
TCA - GTC
Melting of DNA at an elevated temperature (70°C) is primarily due to the breakdown of
phosphodiester bonds
glycosidic bonds
disulphide bonds
hydrogen bonds
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