Essential Genetics: A Genomics Perspective, Fourth Edition: Practice Quizzes

Bears

Title Text: Essential Genetics: A Genomics Perspective, Fourth Edition, Daniel L. Hartl and Elizabeth W. Jones

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: How many proteins are bound to the trp operon when tryptophan and glucose are present?
	A: 4
	B: 3
	C: 2
	D: 1
	E: 0

2: The lactose operator is an essential site for
	A: Repression
	B: Alternative splicing
	C: DNA rearrengement
	D: lacZ amlification
	E: Rapid mRNA turnover

3: Transcriptional cosuppression in Drosophila, is associated with the
	A: cAMP-CRP complex
	B: DNA looping
	C: Repeat-induced point mutation (RIP)
	D: Methylation
	E: Polycomb group of transcriptional silencer proteins

4: In S.cerevisiae, the genetic basis of mating-type interconversion is
	A: Methylation of MATa allele
	B: Methylation of HMRa cassette
	C: Expression of haploid-specific genes
	D: Repression of haploid-specific genes by a1/a2 complex
	E: DNA rearrangement

5: Heavy methylation is associated with
	A: Low transcription rate
	B: High transcription rate
	C: mRNA stability
	D: Programmed DNA rearrengements
	E: DNA looping

6: The production of the lac repressor is
	A: Indusible
	B: Constitutive
	C: Unindusible
	D: cis-dominant

7: The type of gene expression, which is constant and independent of on/off regulatory control is called
	A: Unindusible
	B: Indusible
	C: Constitutive
	D: Combinatorial

8: A regulatory base sequence in eukaryotic cells that increases the rate of transcription of nearby genes regardless of orientation is called a(n)
	A: Enhancer
	B: Silencer
	C: Intron
	D: Attenuator
	E: Shine-Dalgarno sequence

9: The development of the mammalian immune system involves
	A: Genomic imprinting
	B: Attenuation
	C: Chromatin-remodeling complexes
	D: Programmed DNA rearangements
	E: Transcriptional cosuppression

10: How does the lac repressor prevent transcription of lac operon?
	A: By binding to the Shine-Dalgarno sequence, which makes the promoter inaccessible to RNA polymerase
	B: By binding to the operator, which makes the promoter inaccessible to a cAMP-CRP complex
	C: By binding to the operator, which makes the promoter inaccessible to RNA polymerase
	D: By binding lowering levels of cAMP
	E: By binding to the lactose RNA polymerase inactive

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