Bio1334 Genetics - Molecular Genetics - RNA To Proteins (Lecture 3)
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Fill in the blank: Crick and Brenner generated mutants in rII gene of bacteriophage T4 using ________, a planar molecule that intercalates between base pairs in DNA and causes frame-shift mutations.
Demonstrate a sound knowledge of the principles of mRNA translation and protein synthesis Demonstrate a sound understanding of the roles of RNA in translation
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- 2.
What is the name given to the first step of translation?
- 3.
What is the name given to the second step of translation?
- 4.
What is the name given to the final step of translation?
- 5.
The ribosome is a ___________, as it is composed of rRNA which catalyses peptide bond formation.
- 6.
How many types of amino acids are in proteins?
- 7.
Fill in the gap:The genetic code is said to be ___________, because in most cases several codons specify the same amino acid.
- 8.
Name the virus used by Crick and Brenner, which affects E. coli, that was used to crack the genetic code.
- 9.
How do we know the genetic code is not over-lapping?
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Single base mutations only ever affect one amino acid.
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Single base mutations only ever affect one base.
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Single base mutations affect the entire protein.
Correct Answer
A. Single base mutations only ever affect one amino acid. -
- 10.
In which direction is polypeptide synthesis?
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N to C (amino-terminal to carboxy-terminal)
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C to N (carboxyl-terminal to amino-terminal)
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5' to 3'
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3' to 5'
Correct Answer
A. N to C (amino-terminal to carboxy-terminal) -
- 11.
RRNA makes up the ribosome.How many rRNA molecules can be found in the ribosome?
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Four: three in the large subunit, one in the small subunit.
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Four: two in each subunit.
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Three: two in the large subunit, one in the small subunit.
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Three: one in the large subunit, and two in the small subunit.
Correct Answer
A. Four: three in the large subunit, one in the small subunit. -
- 12.
Which of the following items can be found within a ribosome?
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Large ribosomal subunit
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Small ribosomal subunit
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Medium ribosomal subunit
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E site
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A site
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P site
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X site
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Y site
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RRNAs
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TRNAs
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MRNAs
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SnRNAs
Correct Answer(s)
A. Large ribosomal subunit
A. Small ribosomal subunit
A. E site
A. A site
A. P site
A. RRNAs -
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Mar 14, 2022Quiz Edited by
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Nov 04, 2015Quiz Created by
Elly Crook
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