BIOL1300 Chapter Notes -Microtubule, Telophase, Metaphase
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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? |