Genetics: types of RNA, sigma, DNA template, etc.

Question 2

4 out of 4 points

	Which of the following is not part of the transcription unit? Answer
	Selected Answer: RNA polymerase

Question 3

4 out of 4 points

	How many different bacterial RNA polymerases exist in a typical prokaryote? Answer
	Selected Answer: one

Question 4

4 out of 4 points

	What does RNA polymerase III do? Answer
	Selected Answer: synthesizes tRNA in eukaryotes

Question 1

4 out of 4 points

	Which type of RNA carries out RNAi? Answer
	Selected Answer: miRNA

Question 2

4 out of 4 points

	Which type of RNA is part of the ribosome along with ribosomal proteins? Answer
	Selected Answer: rRNA

Question 3

4 out of 4 points

	Besides substates and the transcription apparatus, ___ is required for transcription. Answer
	Selected Answer: DNA template

Question 4

4 out of 4 points

	Which of the following subunits of bacterial RNA polymerase binds to the promoter of the transcription unit? Answer
	Selected Answer: sigma

Genetics: Lac Operon Quiz 2

Question 1

2 out of 2 points

	What gene codes for the lac repressor? Answer
	Selected Answer: lacI

Question 2

2 out of 2 points

	Which type of molecule is lactose? Answer
	Selected Answer: disaccharide

Question 3

2 out of 2 points

	Which of the following describes a region of DNA? Answer
	Selected Answer: operator

Question 4

2 out of 2 points

	What is the name of the protein coded by lacI? Answer
	Selected Answer: C. repressor

Question 5

2 out of 2 points

	What is the name of the inducer of the lac operon? Answer
	Selected Answer: A. allolactose

Question 6

	What is the small molecule that signals the absence of glucose? Answer
	Selected Answer: A. cAMP

Question 7

2 out of 2 points

	What is the DNA element where the lac repressor binds? Answer
	Selected Answer: D. operator

Question 8

2 out of 2 points

	Which of the following does NOT describe an operon? Answer
	Selected Answer: a set of genes in an eukaryote

 

Question 9

2 out of 2 points

	Which gene codes for beta-galactosidase? Answer
	Selected Answer: E. lacZ

Genetics: S-35, P-32, snoRNA, nucleosome, 7-methylguanosine, etc.

Question 1

2 out of 10 points

	Which eukaryotic RNA polymerase synthesizes messenger RNA via pre-mRNA? Answer
	Selected Answer: C. RNA polymerase II

Question 2

2 out of 10 points

	Which radioisotope did Hershey and Chase use to label protein? Answer
	Selected Answer: B. S-35

Question 3

2 out of 10 points

	What is the role of snoRNA? Answer
	Selected Answer: C. to cut out eukaryotic ribosomal RNA

Question 4

2 out of 10 points

	Chromatin is described as "beads on a string." What is the scientific name for the structure that forms the "beads"? Answer
	Selected Answer: C. nucleosome

Question 5

2 out of 10 points

	Which step of eukaryotic mRNA processing helps to protect the 5' end of the mRNA? Answer
	Selected Answer: B. 7-methylguanosine addition

Question 6

2 out of 10 points

	Which type of RNA has buoyant densities of 28S, 5.8S, 18S and 5S? Answer
	Selected Answer: B. eukaryotic rRNA

Question 7

2 out of 10 points

	Which radioisotope did Hershey and Chase use to label DNA? Answer
	Selected Answer: A. P-32

Question 8

2 out of 10 points

	Which type of RNA has introns? Answer
	Selected Answer: A. eukaryotic pre-mRNA