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31 Jan 2019

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

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Reid Wolff
Reid WolffLv2
2 Feb 2019
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