Al Bashaer International School
American Division
Science Department
AP Biology
Name _____________________________ Class __________________ Date __________________
Week 7 Assignment 1
Chapter 15-Genes and how they work
15.1 The Nature of Genes
15.2 The Genetic Code
1. Which of the following is the process of transferring genetic information from DNA to RNA?
a. transcription
b. translation
c. protein synthesis
d. the gene
e. the central dogma
2. Which of the following is the process of decoding RNA as instructions for building an amino acid
chain?
a. translation
b. transcription
c. protein synthesis
d. the gene
e. the central dogma
3. RNA is synthesized on a DNA template in a process called ______, which utilizes the enzyme _______
a.
b.
c.
d.
translation, RNA polymerase
transcription, DNA polymerase
transcription, RNA polymerase
replication, DNA polymerase
4. Which of the following is NOT a necessary component of translation?
a.
b.
c.
d.
anticodon
mRNA
ligase
amino acid
5. Given the following DNA strand, which of the following is its complementary mRNA? G G A C T G A T T
a.
b.
c.
d.
CCTGACTAA
CCUGACUAA
GGACTGATT
TTAGTCAGG
6. Amino acids are joined together into a protein chain by which of the following?
a.
b.
c.
d.
transfer RNA
DNA polymerase
hydrogen bonds
messenger RNA
7. Proteins contain ____ different amino acids, whereas DNA and RNA are composed of ___ different
nucleotides
a.
b.
c.
d.
20, 64
3, 20
4, 20
20, 4
8. The base pair rules states that:
a.
b.
c.
d.
Replication is semiconservative
A pairs with T, G pairs with C
DNA is a double helix held together by hydrogen bonds
A pairs with G, T pairs with C
9. Once transcription has been completed, which of the following is NOT necessary for protein synthesis
to occur?
a.
b.
c.
d.
tRNA
ribosomes
mRNA
DNA
10. Which site of the tRNA molecule binds to the mRNA molecule?
a.
b.
c.
d.
anticodon
codon
amino acid
5 prime end
11. Okazaki fragments occur on the ___ and are bonded together by ______
a.
b.
c.
d.
leading strand, polymerase
mRNA, anticodons
lagging strand, ligase
tRNA, polymerase
12. How many different codons are possible?
a.
b.
c.
d.
3
20
64
an infinite number
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Questions 13–14
If a DNA template strand’s DNA sequence is AAA, what amino acid will be formed?
A
Lys
B
Phe
C
Pro
D
Gly
If a codon has the following sequence, what is the anticodon?
Codon: UCA
A
TCA
B
AGT
C
UCA
D
AGU
There is redundancy in the genetic code but no ambiguity.Why?
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Label & Show by steps the function of Aminoacyl-tRNA Synthetase
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Identify :
a. (ncRNAs)
b. (snRNA)
c. (miRNA)
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