Discussion
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- Question
Sex lethal (sxl) in Drosophila is transcribed when
Options- A. the X autosome balance is less than 0.5
- B. the X autosome balance is 1 or greater
- C. the X autosome balance equals 0.5
- D. none of the above
- Correct Answer
- the X autosome balance is 1 or greater
- 1. What are genes?
Options- A. The functional unit of inheritance
- B. A fragment of DNA
- C. A portion of a chromosome
- D. All of the above Discuss
- 2. Which of the following is not part of the lac operon?
Options- A. I
- B. O
- C. P
- D. none of these Discuss
- 3. A mutation in the tip binding site of the repressor would result in
Options- A. constitutive trp operon expression
- B. inducible trp operon expression
- C. no operon expression
- D. none of the above Discuss
- 4. Methylated gene are
Options- A. active
- B. silent
- C. dynamic
- D. either (a) or (b) Discuss
- 5. The first protein complex to bind to the TATA box is
Options- A. transcription factor IIA
- B. transcription factor IIB
- C. transcription factor IID
- D. all of these Discuss
- 6. Why are several structural genes regulated as a unit in bacteria?
Options- A. An accident of evolution
- B. It allows coordinating regulation of genes with a common function
- C. The bacteria chromosome is so small; many different genes must be controlled by the same promoter
- D. none of the above Discuss
- 7. Transcription factors are
Options- A. regions of DNA in the promoter area
- B. regions of DNA in the enhancer area
- C. any protein which binds to DNA
- D. proteins which bind DNAand initiate transcription Discuss
- 8. Sex determination in Drosophila involves
Options- A. alternate splicing
- B. methylation
- C. gene amplification
- D. none of these Discuss
- 9. Alternate splicing of RNA transcripts is a mechanism to regulate
Options- A. tubulin
- B. tachykinins
- C. DNA methylation
- D. leucine zippers Discuss
- 10. Catabolite activating protein exerts __________ control on transcription of the lac operon genes.
Options- A. positive
- B. negative
- C. may be positive or negative
- D. none of these Discuss
Genetic Regulation Prokaryotes problems
Search Results
Correct Answer: All of the above
Correct Answer: I
Correct Answer: constitutive trp operon expression
Correct Answer: silent
Correct Answer: transcription factor IID
Correct Answer: It allows coordinating regulation of genes with a common function
Correct Answer: proteins which bind DNAand initiate transcription
Correct Answer: alternate splicing
Correct Answer: tachykinins
Correct Answer: positive
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