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Ch 5, Lessons 1-3, 7th Grade
Test Description: DNA
Instructions: Answer all questions to get your test result.
1) What kind of sugar is in DNA?
A
phosphate
B
guanine
C
deoxyribose
D
ribose
2) Which nitrogen base pairing is correct?
A
GT
B
CG
C
AG
D
TC
3) RNA differs from DNA in that
A
RNA contains a different sugar molecule
B
All answers are correct
C
RNA has uracil instead of thymine
D
RNA has one strand
4) Uracil pairs with
A
thymine
B
adenine
C
cytosine
D
guanine
5) A protein is a chain of
A
genes
B
fats
C
chromosomes
D
amino acids
6) A mass of cancer cells is called a
A
bruise
B
cyst
C
contusion
D
tumor
7) How do we usually name cancer?
A
none of the above
B
how big the tumor is
C
where it started in the body
D
where it spread in the body
8) Chemotherapy affects normal cells as well as cancerous cells.
A
true
B
false
9) ___ carries the info from the genetic code out of the nucleus and into the cytoplasm
A
messenger RNA
B
carrier RNA
C
postal RNA
D
transfer RNA
10) Each ___ on a chromosome contains the information to conde for one specific protein.
A
chromosome
B
helix
C
gene
D
base
11) ___determine a variety of traits, from hair color to an organism's ability to digest food.
A
proteins
B
bases
C
cells
D
nerves
12) DNA can be found in all cells in the body except
A
white blood cells
B
muscle cells
C
skin cells
D
red blood cells
13) How many bases code for one amino acid?
A
2
B
5
C
3
D
4
14) The order of the base code units determines the order in which amino acids are put together to form a protein.
A
true
B
false
15) The process in which an identical copy of a DNA strand is formed for a new cell.
A
protein synthesis
B
DNA synthesis
C
DNA replication
D
DNA extraction
16) A mutation can cause a cell to produce an incorrect
A
chromosome
B
protein
C
blood cell
D
nucleus
17) When can mutations occur?
A
both
B
mistakes in the DNA replication process
C
when chromosomes don't separate properly
18) A mutation that makes it difficult for an animal to catch prey would be considered
A
helpful
B
neither helpful nor harmful
C
harmful
19) There are more than ___ types of cancer.
A
175
B
200
C
100
D
50
20) Factors that can determine if a person gets cancer include
A
all
B
high-fat diets
C
genetics
D
substances in the environment
*select an answer for all questions
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