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

5.

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

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

Which one of the following a wrongly matched?

• Transcription - Writing information from DNA to t-RNA

• Translation - Using information in m - RNA to make protein

• Repressor protein - Binds to operator to stop enzyme synthesis

• Repressor protein - Binds to operator to stop enzyme synthesis

Transformation was discovered by 

• Meselson and Stahi

• Hershey and Chase

• Griffith

• Griffith