Bios 302-spring 2018-quiz 4 answer key PDF

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Dr. Draper Molecular Biology (BIOS 302) Quiz 4 Answer KEy...

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Bios 302. Quiz 4. Wednesday, April 25th, 2018. 1. Which of the following statements are FALSE regarding the characteristics of RNA? a. RNA is short compared to DNA b. RNA is usually single stranded c. RNA can only form B-helices. RNA cannot form B-helices d. RNA contains uracil e. RNA has a 2’ and 3’ hydroxyl group 2. Intramolecular structures formed by base pairing between proximal complementary nucleotides in RNA is referred to as? a. Primary structure b. Secondary structure

c. Tertiary structure d. Quaternary structure

3. The template strand and the coding strand are two names for the same strand of DNA. a. True

b. False

4. In prokaryotes, the sequence of nucleotides in the -35 box is always TTGACA. a. True

b. False

5. In bacteria, the part of RNA polymerase that recognizes and binds to the promoter is the? a. TATA-binding protein b. Core enzyme

c. Pribnow box d. Sigma factor

6. How does the RNA poly-U sequence facilitate intrinsic prokaryotic transcription termination? a. The poly-U sequence forms a stem-loop structure, causing RNA polymerase to pause b. Because there are only 2 hydrogen bonds between adenine and uracil, it is easier for the RNA:DNA hybrid to dissociate when RNA polymerase stalls at a stem-loop c. The poly-U sequence is where rho protein binds the newly synthesized RNA molecule d. A poly-U sequence is not required for intrinsic prokaryotic termination 7. Messenger RNA (mRNA) is an exact RNA copy of a gene’s DNA sequence. a. True b. False...