In vertebrate genes, focused promote[s]; a) are associated with genes that are r

Question

In vertebrate genes, focused promote[s]; a) are associated with genes that are regulated b) start transcription at several specific base pairs that are near each other. c) are rape or absent d) all the above Eukaryotic transcription factors: a) bind to other proteins b) contain a DNA-binding domain c) both of the above are true Antibody diversity is generated by; a) only alternative splicing in the mRNA b) recombination of gene segments in the DNA c) neither of the above If a wild type E. coli strain is grown in the absence of tryptophan, the operon will be; a) NOT transcribed b) transcribed In the lactose operon of E. coli lac o is the operator gene, lac i is the repressor gene and lac z codes for beta-galactosidase. If an E. coli strain of genotype I & C of z*/F'O' is grown in the absence of lactose, the Lac z gene will be; a) NOT transcribed b) transcribed In negative regulation, an operon is transcribed when the regulatory protein is bound to the DNA. In the lactose operon of E. coli lac o is the operator gene, lac i is the repressor gene and lac z codes for beta-galactosidase. If an E. coli strain of genotype lac i 'z'/F'i' is grown in the absence of lactose, the lac z gene will be: NOT transcribed b) transcribed Which of the following is true about the E. coli lactose operon? a) CAP-CAMP binds to beta-galactosidase b) CAP protein by itself binds to the operator c) when glucose is absent, cAMP levels decrease. d) when CAP-CAMP levels are higher, transcription increases.

Explanation / Answer

14. The answer is B.
15. The answer is C.
16. The answer is B.
17. The answer is B.
18. The answer is B.
19. The answer is A.
20. The answer is A.
21. The answer is D.

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