Multiple Choice QuestionsWhich of the following is required as inducer(s0 for the expression of lac operon?
galactose
lactose
lactose and galactose
lactose and galactose
B.
lactose
Lac operon is and inducible operon. Lactose is the substrate for the enzyme 
-galactosidase and it also regulates switching on and off of the operon. Hence, it is termed as inducer.
The two polypeptides of human insulin are linked together by
phosphodiester bonds
covalent bonds
disulphide bridges
disulphide bridges
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
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
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