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