Download Biology 12 Name: p509-516, p520 Chap 25 Review Questions Date

Biology 12
p509-516, p520
Name: ______________
Chap 25 Review Questions
Date: _______________
1. Which of the following cell structures is the site of DNA replication?
A. nucleus
B. ribosome
C. nucleolus
D. rough endoplasmic reticulum
2. Which of the following events occurs during DNA replication?
A. Deoxyribose bonds to phosphate.
B. Hydrogen bonds are formed between the original nucleotides.
C. Bonds form between the DNA nucleotides and RNA nucleotides.
D. Phosphates of the original nucleotides bind to those of the new nucleotides.
Use the following diagram to answer question 3
3. What has occurred to this molecule to cause it to change as shown
A. Ionic bonds have broken between deoxyribose molecules.
B. Hydrogen bonds have been broken between nitrogenous bases.
C. New bonds have formed causing the molecule to change shape.
D. Covalent bonds have been broken between phosphate molecules.
4. In an experiment, a molecule known to be a competitive inhibitor to the enzyme helicase
is added to a culture of actively dividing cells. Which of the following would likely occur?
A. The cells would reproduce more rapidly.
B. The rate of transcription would increase.
C. The rate of DNA production by cells would decrease.
D. The amount of free nucleotide molecules in the cells would decrease.
5. Which of the following molecules contains anticodons?
A. DNA
B. tRNA
C. mRNA
D. amino acid
6. Which molecule is not composed of nucleotides? Use the diagram below
A. W
B. X
C. Y
D. Z
6
7. What event is shown in the diagram to the side
A. Replication B. Translation
C. Transcription
D. mutation
8. A tRNA molecule with the anticodon GCU would be carrying
the amino acid:
A. valine
B. tyrosine
C. alanine
D. arginine
9. Which of the following is NOT a frameshift mutation of the nucleotide sequence
CATUAUCCC?
a) CATTUAUCCC
c) CTUAUCCC
e) CCATUAUCCC
b) ATUAUCCC
d) CATUAUCCGC
10. A strand of DNA has the following bases: C A C G G C C . If a frameshift mutation
occurred & the adenine base was deleted, which amino acids would be coded for?
11.
Fill in the following table: (3)
DNA
mRNA
G
G
U
G
U
A
anticodon
amino acid
12a. What is the difference between a mutagen and a mutation?
b. List 2 examples of mutagens & 2 types of mutations.
13. Put phrases 1 - 6 in the correct order to describe protein synthesis: (1)
1.
2.
3.
4.
5.
6.
mRNA is produced in the nucleus
ribosomes move along mRNA
DNA has a code
polypeptide results
tRNA brings amino acids to ribosomes
mRNA moves to ribosomes
14. Compare the Structure of RNA to DNA
A
U
U