BIOL 2604 Lecture Notes - Lecture 3: Beta-Galactosidase, Pribnow Box, Corepressor
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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
Please help on these. Thank you!
Question 1
Which of the following is NOT a channel in the RNA polymeraseenzyme?
RNA exit channel | ||
DNA entry channel | ||
DNA exit channel | ||
Nucleotide exit channel |
Question 2
A promoter region upstream of a bacterial gene typically has thesequence TTGACA in the -35 position and TATAAT in the -10 position.If there was a 5 bp insertion at the -40 position, such thateverything downstream was shifted (ie: the "-35 element" is now atthe -30 from the transcription start site), which of the followingwill occur?
Sigma protein will not bind and so no transcription willoccur. | ||
RNA polymerase will not bind and so no transcription willoccur. | ||
Sigma protein will bind to its target sequences and sotranscription will start 5bp downstream from the originaltranscription start site. | ||
Sigma protein will bind as usual and transcription will startappropriately at the transcription start site. |
Question 3
A person has a mutation that prevents TFIIH from being produced.Which of the following outcomes will occur?
No transcription because TFIID will not be able to bind. | ||
No transcription because the DNA strand will not be opened. | ||
Transcription will occur, but it will not be in the correctposition. | ||
Transcription will occur as usual. |
Question 4
There are 4 rRNAs produced to make both subunits of theribosome. How many transcripts are required to produce these 4rRNAs?
1 | ||
2 | ||
3 | ||
4 |
Question 5
True or False: the 5' 7m-Gppp cap is attached to the start codonof the mRNA.
True. | ||
False, the cap is attached to the 5'-untranslated region. | ||
False - the cap is attached to the 3'-untranslated region. | ||
False, the cap is attached to the polyA tail. |
Question 6
During the splicing mechanism, which of the following joins twoexons together?
A 2'OH attacks a 5' phosphate | ||
A 5' phosphate attacks a 2'OH | ||
A 3'OH attacks a 5' phosphate | ||
A 5' phosphate attacks a 3'OH Question 7 After their experiment in Neurospora, Beadle and Tatum concludedthat each single genes code for single enzymes. Do you agree withtheir statement, why or why not? |