BIOS 1700 Lecture Notes - Lecture 6: Central Dogma Of Molecular Biology, Polyadenylation, Intron

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silvergerbil790

13 Sep 2016

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Rna polymerase ll makes a rna strand from the template dna strand in eukaryotic cells. Rna polymerase ends at the terminator of the. Both stands of dna can serve as the template strand. When writing about base sequences for an rna model we must write from 5" to 3". Friday, september 2, 2016: so if the strand reads 3" to 5" we must ip it 180. For example, gene b (above) is in the correct format to simply copy down the rna sequence. However, gene a is in the incorrect format. To copy down gene a"s sequence, write down the rna sequence as it appears and then ip it: example: Prokaryotes: simple, a sigma ( ) factor bonds to the tata box in the promoter region to recruit a rna polymerase ll to begin transcription. Eukaryotes: complex, includes promoters and enhancers.

Related Questions

Which type of RNA is unique to eukaryotes?

		mRNA
		rRNA
		tRNA
		snRNA
		Its a trick, all cells have all four types of RNA.

1 points

QUESTION 2

The region of DNA to which RNA polymerase binds to initiate transcription is the:

		origin
		promoter
		enhancer
		none of the above are correct

1 points

QUESTION 3

Holoenzyme:

		is RNA polymerase core enzyme.
		is sigma factor.
		is core plus sigma factor.
		none of the above are correct.

1 points

QUESTION 4

Which of these is formed FIRST when RNA polymerase binds to a promoter?

		The closed promoter complex
		The open promoter complex
		A rho-independent terminator
		none of the above are correct.

1 points

QUESTION 5

A hairpin loop followed by a run of Us:

		is the sequence formed in the sense strand of a gene using a rho-independent terminator.
		is the sequence recognized by the rho protein.
		is the structure formed in RNA that causes rho-independent termination.
		is formed immediately after the open promoter complex is formed.

1 points

QUESTION 6

RNA polymerase:

		reads the template strand of the DNA in the 3' to 5' direction.
		synthesizes the RNA in the 5' to 3' direction.
		can begin transcription without a primer.
		all of the above are correct.

1 points

QUESTION 7

Which of the following statements is FALSE?

		Bacteria like E. coli have only one type of sigma factor.
		RNA polymerase has no proofreading activity.
		The promoter of a gene is upstream of the RNA-coding region.
		Bacterial transcriptional terminators are copied into RNA to cause termination.

1 points

QUESTION 8

If the template strand of a gene has the sequence 5' ATGCGAT 3', then:

		the RNA produced will have the sequence 5' AUGCGAU 3'.
		the RNA produced will have the sequence 5' UAGCGUA 3'.
		the RNA produced will have the sequence 5' AUCGCAU 3'.
		None of the above are correct.

1 points

QUESTION 9

The sense strand:

		is the lagging strand
		is also the template strand.
		always goes left to right.
		none of the above are correct.

1 points

QUESTION 10

Which of these is transcribed but not translated?

		mRNA
		tRNA
		rRNA
		all of the above
		tRNA and rRNA are transcribed but not translated.

please help i am a bit confused

1. The Pribnow Box is a

A. attenuator

B. enhancer

C. promoter

D. operator

2. Which of the following do not occur during post-transcriptional processing of RNA in eukaryotes?

A. the splicing of introns

B. addition of a poly-A at the 3' end

C. removal of introns

D. addition of a 7-methyl guanosine cap at the 5' end

3. In transcription, RNA polymerase binds at

A. a promoter

B. an operator

C. the oriC locus

D. an enhancer

4. The Central Dogma in genetics describes

A. the pattern of information flow in the cell

B. the pattern of chromosomal inheritance in populations

C. the role of mutations in disease

D. the role of promoters

5. Which of the following sequences of DNA could code for a stem-loop structure (only the template strand is shown)?

A. 3'--G-G-C-C-C-T-T-G-G-A-A-A-A-C-C-A-A-G-G-G-C-C--5'

B. 3'--G-G-C-C-C-T-T-G-G-A-A-A-A-G-G-T-T-C-C-C-G-G--5'

C. 3'--G-G-C-C-C-T-T-G-G-T-T-T-T-G-G-C-C-C-T-T-G-G--5'

D. none of the above

6. Removal of introns from RNA is by

A. primosomes

B. peptidases

C. galactosidases

D. spliceosomes

7. Which of the following represents the units for measuring the rate of sedimentation of a molecule/organelle in a sucrose gradient?

A. molecular weight

B. Svedberg units

C. map units

D. Daltons

8. During transcription, which strand is not read by the RNA polymerase?

A. coding strand

B. noncoding strand

C. template strand

D. terminator strand

9. The function of the rho protein is

A. to help terminate translation

B. to help RNA polymerase bind to the DNA

C. to help RNA polymerase find a promoter

D. to help terminate transcription

10. The unusual bases found in transfer RNAs

A. are added during transcription

B. are normal bases that have been modified after transcription

C. help the tRNAs to bind to DNA

D. ensure that the tRNA stays linear in solution

1. A region of a chromosome contains two strands of DNA, yet only one is used to transcribe a gene because

A. all genes are found on the same strand of DNA in a chromosome.

B.both strands are transcribed, but only one strand of DNA contains a reading frame.

C.RNA polymerase binds to the terminator, stopping transcription on one strand of DNA.

D.RNA polymerase binds to the promoter, which precedes the gene only on the template strand of DNA.

E.the start of transcription is random along the chromosome and doesn't always occur on a gene.

2. In eukaryotes an mRNA molecule can only be translated by one ribosome at a time.

True or False

3.The process by which cells use the information of RNA molecules to make proteins is transcription.

True or False

BIOS 1700 Lecture Notes - Lecture 6: Central Dogma Of Molecular Biology, Polyadenylation, Intron

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