Aminoacyl tRNA Synthetase Class II Physiology, Biochemistry, and Mechanism

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Science, Chemistry, Biology
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University
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary role of messenger RNA (mRNA) in the cell?
To catalyze chemical reactions
To carry genetic information from DNA to the ribosome
To form the structural components of the ribosome
To transport amino acids to the ribosome
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a step in mRNA processing?
Conversion to DNA
Addition of a 5' cap
Splicing of exons
Formation of a poly-A tail
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does it mean when a tRNA is 'charged'?
It is ready to be transcribed
It is bound to an amino acid
It has been converted to mRNA
It has a phosphate group attached
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which nutrient is NOT directly rate-limiting for the charging of tRNA?
Amino acids
ATP
tRNA
Glucose
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What class of enzymes do aminoacyl-tRNA synthetases belong to?
Oxidoreductases
Transferases
Hydrolases
Ligases
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many amino acids are specifically recognized by Type 2 aminoacyl-tRNA synthetases?
15
10
5
20
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the initial nucleophile in the mechanism of Type 2 aminoacyl-tRNA synthetases?
Amino group of the amino acid
Hydroxyl group of the ribose
Carboxyl group of the amino acid
Phosphate group of ATP
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