MCQ Book Questions

Q51720. The newly entering amino acyl tRNA into A site requires

Q51721. The α-amino group of the new amino acyl tRNA in the A site carries out a nucleo- philic attack on the esterified carboxyl group of the peptidyl tRNA occupying the P site. This reaction is catalysed by

Q51722. The nucleophilic attack on the esterified carboxyl group of the peptidyl-tRNA occupying the P site and the α-amino group of the new amino acyl tRNA, the number of ATP required by the amino acid on the charged tRNA is

Q51723. Translocation of the newly formed peptidyl tRNA at the A site into the empty P site involves

Q51724. In eukaryotic cells

Q51725. The mushroom poison amanitin is an inhibitor of

Q51726. Tetracylin prevents synthesis of polypep- tide by

Q51727. In prokaryotes, chloramphenicol

Q51728. Erythromycin acts on ribosomes and in- hibit

Q51729. The binding of prokaryotic DNA depen- dent RNA polymerase to promoter sites of genes is inhibited by the antibiotic:

Q51730. The gene which is transcribed during repression is

Q51731. The minimum effective size of an operator for lac repressor binding is

Q51732. In the lac operon concept, a protein mole- cule is

Q51733. The catabolite repression is mediated by a catabolite gene activator protein (CAP) in conjunction with

Q51734. The enzyme DNA ligase

Q51735. Restriction endonucleases

Q51736. The most likely lethal mutation is

Q51737. In the following partial sequence of mRNA, a mutation of the template DNA results in a change in codon 91 to UAA. The type of mutation is 88 89 90 91 92 93 94 GUC GAC CAG UAG GGC UAA CCG

Q51738. Restriction endonucleases recognize and cut a certain sequence of

Q51739. Positive control of induction is best described as a control system in which an operon functions