Download HRW BIO CRF Ch 09_p01-58

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Name
Class
Date
Skills Worksheet
Vocabulary Review
Complete the crossword puzzle using the clues provided.
ACROSS
DOWN
2. five-carbon sugar found in DNA
nucleotides
1. relationship of two DNA strands to
each other
3. enzyme that adds nucleotides to
exposed nitrogen bases
4. disease-causing
5. Baserules describe the
arrangement of the nitrogen bases
between two DNA strands.
4. substance prepared from killed or
weakened microorganisms
6. change in phenotype of bacteria
caused by the presence of foreign
genetic material
7. the process by which DNA is
copied
9. A replication
is the
area that results after the double
helix separates during replication.
8. The term double
is
used to describe the shape of DNA.
10. a virus that infects bacteria
11. enzyme that separates DNA by
breaking the hydrogen bonds that
link the
nitrogen
1
bases
2
12. name
for DNA
subunit
3
4
5
6
7
8
9
10
11
12
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Biology
13
DNA: The Genetic Material
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TEACHER RESOURCE PAGE
Active Reading
Vocabulary Review
SECTION: IDENTIFYING THE
GENETIC MATERIAL
ACROSS
2. DEOXYRIBOSE
3. POLYMERASE
4. VACCINE
6. TRANSFORMATION
8. HELIX
10. BACTERIOPHAGE
11. HELICASE
12. NUCLEOTIDE
1. It protects the body against future
2.
3.
4.
5.
6.
7.
8.
infections by the microorganisms
from which it was prepared.
The capsule protects the bacterium
from the body’s defense systems and
this makes the bacterium virulent.
able to cause disease
The mice remained healthy.
The mice still lived.
The mice died.
The live R bacteria had acquired
polysaccharide capsules.
d
DOWN
1. COMPLEMENTARY
4. VIRULENT
5. PAIRING
7. REPLICATION
9. FORK
SECTION: THE STRUCTURE OF DNA
Science Skills
1. A double helix consists of two strands
twisted around each other.
INTERPRETING DIAGRAMS
2. It provides a visual model of a double
3.
4.
5.
6.
7.
1. A. phosphate group
B. pyrimidine (thymine)
C. hydrogen bond
D. purine (adenine)
E. deoxyribose
2. the hydrogen bonds between the
helix’s structure.
Answers may vary. Possible responses
include a coil of fencing material or
railroad tracks that wind around a
mountain or a coiled telephone cord.
Nucleotides are units, or parts, that
form DNA.
a phosphate group, a five-carbon sugar
molecule, and a nitrogen base
It stands for deoxyribonucleic acid.
a
bases; cytosine and guanine form
three hydrogen bonds, whereas
adenine and thymine form only
two hydrogen bonds.
3. TAA-GGC
Concept Mapping
SECTION: THE REPLICATION OF DNA
1. the process by which a copy of DNA
2.
3.
4.
5.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
is made
during the synthesis (S) phase of the
cell cycle before a cell divides
the double helix must unwind
Part a. The two original DNA strands
separate or unwind.
Part b. DNA polymerases add complimentary nucleotides to each strand.
Part c. When both strands are completely copied, all enzymes detach.
This process produced DNA molecules, each composed of a new and
an original strand.
c
Watson and Crick
Franklin and Wilkins
amount of base pairs
double helix
purine or pyrimidine
pyrimidine or purine
replication
DNA polymerase
nitrogen base
phosphate group or five-carbon sugar
five-carbon sugar or phosphate group
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Holt Biology
81
DNA: The Genetic Material