State the ‘Central dogma’ as proposed by Francis Crick. Are there any exceptions to it? Support your answer with a reason and an example.

Explain how the biochemical characterisation (nature) of ‘Transoforming Principle’ was determined. which was not defined from Griffith’s experiments.

Which of the following is required as inducer(s0 for the expression of lac operon?

• galactose

• lactose

• lactose and galactose

• lactose and galactose

The two polypeptides of human insulin are linked together by

• phosphodiester bonds

• covalent bonds

• disulphide bridges

• disulphide bridges

Which of the following is the starter codon?

• UGA

• UAA

• UAG

• UAG

Which one of the following is not applicable to RNA?

• Complementary base pairing

• 5, phosphoryl and 3' hydroxyl ends

• Heterocyclic nitrogenous bases

• Heterocyclic nitrogenous bases

Identify the correct order of organisation of genetic material from largest to smallest

• Chromosome, gene, genome, nucleotide

• Genome, chromosome, nucleotide, gene

• Genome, chromosome, gene, nucleotide

• Genome, chromosome, gene, nucleotide

Balbiani rings rigs are sites of

• Lipid synthesis

• Nucleotide synthesis

• Polysaccharide synthesis

• Polysaccharide synthesis

169.

Satellite DNA is important because it

• codes for proteins needed in cell cycle.

• shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children.

• does not code for proteins and is same in all members of the population.

• does not code for proteins and is same in all members of the population.

Which one of the following shows coiled RNA stands and capsomeres?

• Polio virus

• Tabacco mosaic virus

• Measles virus

• Measles virus