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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
deoxyribose
B
ribose
C
phosphate
D
guanine
2) Which nitrogen base pairing is correct?
A
TC
B
AG
C
GT
D
CG
3) RNA differs from DNA in that
A
All answers are correct
B
RNA has uracil instead of thymine
C
RNA has one strand
D
RNA contains a different sugar molecule
4) Uracil pairs with
A
adenine
B
guanine
C
cytosine
D
thymine
5) A protein is a chain of
A
fats
B
chromosomes
C
amino acids
D
genes
6) A mass of cancer cells is called a
A
cyst
B
contusion
C
tumor
D
bruise
7) How do we usually name cancer?
A
where it started in the body
B
none of the above
C
how big the tumor is
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
carrier RNA
B
postal RNA
C
messenger RNA
D
transfer RNA
10) Each ___ on a chromosome contains the information to conde for one specific protein.
A
helix
B
chromosome
C
base
D
gene
11) ___determine a variety of traits, from hair color to an organism's ability to digest food.
A
nerves
B
cells
C
proteins
D
bases
12) DNA can be found in all cells in the body except
A
red blood cells
B
skin cells
C
muscle cells
D
white blood cells
13) How many bases code for one amino acid?
A
5
B
4
C
2
D
3
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
DNA synthesis
B
protein synthesis
C
DNA replication
D
DNA extraction
16) A mutation can cause a cell to produce an incorrect
A
protein
B
nucleus
C
blood cell
D
chromosome
17) When can mutations occur?
A
mistakes in the DNA replication process
B
when chromosomes don't separate properly
C
both
18) A mutation that makes it difficult for an animal to catch prey would be considered
A
neither helpful nor harmful
B
helpful
C
harmful
19) There are more than ___ types of cancer.
A
100
B
50
C
175
D
200
20) Factors that can determine if a person gets cancer include
A
high-fat diets
B
genetics
C
substances in the environment
D
all
*select an answer for all questions
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