Question

ID: 4 A new sugar, sugarose, induces synthesis of two anxvmes from the sug operon or are know to be involved in sugarose utilization. The table below shows the induction of two enzymes from the sug operon of E. coll. Four genes enzymes in strains carrying doletion mutations co ntion affecting each on Here, ' means the enzyme is induced normally, 'C' means the enzyme '0' means the enzyme is never detected. cod normally, 'C' means the enzyme was synthesized constitutively. the induction behavior of the two enzyme 1 mutation of gene A gene B genec gene D enzyme 2 a repressor 9 what you do about operon regulation in E. coli, which gene is likely to encodo a repro protein that regulates the genes for enzymes 1 and 2 in wild type con a) gene B b) gene A c) gene D d) gene C e) none of the above 29) The ribonucleoprotein enzyme telomerase a) acts to extend chromosome ends by adding nucleotides to the 3' end of the DNA strand, using its own RNA as a template, and its own reverse transcriptase activity b) acts to extend chromosome ends by adding nucleotides to the 3' end of the DNA strand, using its own DNA as a template, and its own DNA polymerase activity c) acts to extend chromosome ends by adding nucleotides to the 5' end of DNA, using its own RNA as a template, and its own DNA polymerase activity d) acts to extend chromosome ends by adding nucleotides to the 3' end of the DNA strand, using its own DNA as a template, and its own reverse transcriptase activity e) acts to extend chromosome ends by adding nucleotides to the 3' end of DNA. using its own RNA as a template, and its own DNA exonuclease activity

Answer 1

29. Correct answer - a) because Telomerase enzyme uses its own RNA as a template and by its reverse transcriptase activity it adds telomere repeat sequence to the 3' end of the telomeres that need repair.

The ribonucleoprotein enzyme telomerase is found in eukaryotes. It doesnt uses  its own DNA as a template so option b) is incorrect.

It works by adding repeat sequence to the 3' end of the DNA so option c) is incorrect.

Since it uses its own RNA as a template and not the DNA as a template to repair the telomeres option d) is incorrect.

It works through its reverse transcriptase activity and not the DNA exonuvlease activity so option e) is incorrect too.