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MICRO CH 8

MICRO CHAPTER 8 UNIT 4

QuestionAnswer
Which of the following pairs is mismatched? A) DNA polymerase - makes a molecule of DNA from a DNA template B) RNA polymerase - makes a molecule of RNA from an DNA template C) DNA ligase - joins segments of DNA D) Transposase - cuts DNA leaving st E
An enzyme produced in response to the presence of a substrate is called A) An inducible enzyme. B) A repressible enzyme. C) A restriction enzyme. D) An operator. E) A promoter. A
The initial effect of ionizing radiation on a cell is that it causes A) DNA to break. B) Bonding between adjacent thymines. C) Base substitutions. D) The formation of highly reactive ions. E) The cells to get hot. D
According to the operon model, for the synthesis of an inducible enzyme to occur, the A) End-product must not be in excess. B) Substrate must bind to the enzyme. C) Substrate must bind to the repressor. D) Repressor must bind to the operator. E) C
Synthesis of a repressible enzyme is stopped by A) The allosteric transition. B) The substrate binding to the repressor. C) The corepressor binding to the operator. D) The corepressor-repressor binding to the operator. E) The end-product binding D
The damage caused by ultraviolet radiation is A) Never repaired. B) Repaired during transcription. C) Repaired during translation. D) Cut out and replaced. E) Repaired by DNA replication. D
The mechanism by which the presence of glucose inhibits the lactose operon. A) Catabolic repression B) Translation C) DNA polymerase D) Repression E) Induction A
The mechanism by which the presence of lactose controls the lactose operon. A) Catabolic repression B) Translation C) DNA polymerase D) Repression E) Induction E
The lac operon A) Produces repressible enzymes. B) Produces constitutive enzymes. C) Produces inducible enzymes. D) None of the above. E) C
Created by: 315233
 

 



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