Chemical Selection And The RNA World
10 Questions
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Questions and Answers
- 1.In the RNA world, what two functions did RNA have?
- A.
Synthesis of lipids
- B.
Storing of genetic information
- C.
Catalysis of chemical reactions
- D.
Participation in transcription and translation
- 2.What two mutations occurred that made RNA the favorable macromolecule?
- A.
Ability to form ionic bonds
- B.
Ability to degrade other RNA molecules
- C.
Ability to self-replicate
- D.
Ability to synthesize nucleotides
- 3.Chemical selection occurs when a chemical has special properties that cause it to increase in...
- 4.Bartel and Szostak were the two scientists who proved chemical selection.
- A.
True
- B.
False
- 5.In Bartel and Szostak's experiment, each type of RNA, long and short, had how many regions?
- A.
1
- B.
2
- C.
3
- D.
4
- 6.What was the purpose of the tag sequence on the short RNA?
- A.
To attach to the long RNA
- B.
To form a covalent bond with another tag sequence
- C.
To break the bond between long and short RNA
- D.
To bind to the beads
- 7.Match the item used in Bartel and Szostak's experiment with its respective function.
- A. Beads
- A.
- B. 220-nucleotide region of the long RNA
- B.
- C. 3' end of the short RNA
- C.
- D. Low pH wash
- D.
- E. Pool of RNA
- E.
- 8.It is possible that DNA formed from an RNA molecule that had the ability to reverse transcribe.
- A.
True
- B.
False
- 9.Which are reasons why DNA was favored over RNA to store genetic information? (More than one answer)
- A.
DNA is more stable
- B.
RNA is more stable
- C.
Since DNA is double stranded, it could take on the roles of storing information and catalyzing chemical reactions
- D.
RNA could perform more functions if it didn't have to store information
- 10.Experiments have proven that RNA can catalyze the formation of peptide bonds. This would lead to the formation of...
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