GAU codon is mutated nd changed to a GAC oon, then C) redundanc E) sone of the a
ID: 268013 • Letter: G
Question
GAU codon is mutated nd changed to a GAC oon, then C) redundanc E) sone of the above F) all of the above s) If the Operator site was deleted away, what would happen to the Lac operon? deleted A) the operon would turs on and stay on B) nothing C) the operon would never come on again D) the operon would come on and off depending whether Lac was prevent E) none of the above 9) Which of the following is necessary for successful translation? A) rRNA B) tRNA C) aminoacyl transferase D) mRNA E) all of the above F) noee of the above 10) What often tcrminates the RNA polymerase transcription when it gets to the end of the gene? A) An enzyme called arrestase B) A special stop tRNA C) A stop codon D) A stem and loop E) None of the above F) All of the above 11) In the bacteria Bacillusreinum, there is a gene which synthesizes vita in C The expresion is activated when the cofactor XI binds near the promoter allowing the RNA polymerase to bind as well. What type of regulation is this likely to be? A) Negative B) Positive C) A prioni D) A posteriori E) None of the above 12) Addition of both glucose and lactose to an E. coli cell A) activates the Lac operon B) turns off the Lac operon C) has no effect on Lac operon expression D) A and B E) none of the above 13) The property of DNA strands being 5-3' and 3'-5' is called A) an anti-parallel configuration B) a phosphate backbone configuration C) a multiphasic configuration D) a degenerate configuration E) none of the above F) all of the aboveExplanation / Answer
7. More than one codon can code for same amino acid. This property is known as codon degeneration. Since, this option is missing. Hence, option “E “ is correct.
8. If operator would be deleted, it will transcribe at all the times. Hence, option “A” is correct.
9.All the option that are given in the question, like mRNA, tRNA, rRNA, amino acyl transferase . Hence, option “E “ is correct.
10. Transcription stop when, specific signal present in the RNA signal that transcription is to be stopped. Hence, option “E “ is correct.
12Addition of both glucose and lactose, activates the lac operon. Hence, option “A” is correct.
13.The parallel of DNA is anti-parallel, means both run parallel, but running in opposite direction. Hence, option “A” is correct. .
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