Download chapter 12 test review key

Name: ______________________
Chapter 12 Test Review
Date: ________
Complete the table below to show the comparison between DNA and RNA.
DNA
Number of Strands
Name of 5 carbon Sugar
4 Nitrogen Bases
RNA
1
2
Two
one
3
4
deoxyribose
ribose
5
6
Adenine, guanine,
cytosine & thymine
Adenine, guanine,
cytosine & uracil
Match each “DNA discovery” to the person or persons who were responsible for the
discovery.
A. Griffith
B. Avery
C. Hershey and Chase
7 ___C___“Discovered” that DNA is the genetic material that can cause bacteria to make
viruses instead of new bacteria.
8 ___B___“Discovered” that DNA is the factor that caused one bacterium to transform into
another strain.
9 ___A___“Discovered” that some unknown factor causes transformation to occur.
Read each statement and decide if each statement is true or false. Write true on the line if
the statement is true and write false on the line if the statement is false. If you would like
five extra credit points please draw a smiley face next to the date.
10____True___Nucleic acids store and communicate genetic information.
11 ____False__DNA is single-stranded.
12____False__There are 5 parts to a nucleotide.
Name: ______________________
Chapter 12 Test Review
Date: ________
13__True_____DNA is the genetic material involved in many experiments.
14___True____DNA is shaped like a “double helix”.
Complete the sequences below using the coding sequence of DNA:
15 Non-coding DNA
A
T
G
C
T
A
16 Coding DNA
T
A
C
G
A
T
17
mRNA
A
U
G
C
U
A
18
tRNA
U
A
C
G
A
U
19 Amino Acid
Start (Meth)
Leucine
(from codons)
20 Look at the picture and complete it by:




Labeling the phosphates with a “P” (circles)
Labeling the sugars with an “S” (pentagons)
Completing the nitrogen base sequences G, A, G, T
Circling one nucleotide. Set of circle, pentagon & base
Name: ______________________
Chapter 12 Test Review
Date: ________
21 Why would some consider a body cell mutation better than a sex cell mutation?
_____________If a mutation occurs in a body cell the only cells that carry that
mutation will be the daughter cells of that one cell. Only a certain group of cells
will carry the incorrect information. If a mutation or change of information
occurs in a sex cell that means that as mitosis occurs as the organism grows and
develops every cell in that particular organism carries the
mutation.________________
22 What are some types of genetic mutations.
Point mutations that have a substitution of nitrogen base
(nucleotide), missense, nonsense & silent
Or Frameshift when a nucleotide is inserted (added) or deleted (subtracted) and
the sequence that follows is all misread.
23 What are some of the causes of genetic mutations?
Mutagens- mistakes are made in process, virus, fever, toxins
(chemicals), UV radiation, X ray radiation