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Biology Chapter 12 Practice Test DNA/RNa
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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1. Which of the following is a nucleotide found in DNA?
a. ribose + phosphate group + thymine
b. ribose + phosphate group + uracil
c. deoxyribose + phosphate group + uracil
d. deoxyribose + phosphate group + cytosine
2. DNA replication results in two DNA molecules,
a. each with two new strands.
b. one with two new strands and the other with two original strands.
c. each with one new strand and one original strand.
d. each with two original strands.
3. Unlike DNA, RNA contains
a. adenine.
c. phosphate groups.
b. uracil.
d. thymine.
4. Which type(s) of RNA is(are) involved in protein synthesis?
a. transfer RNA only
b. messenger RNA only
c. ribosomal RNA and transfer RNA only
d. messenger RNA, ribosomal RNA, and transfer RNA
5. How many codons are needed to specify three amino acids?
a. 3
c. 9
b. 6
d. 12
Completion
Complete each sentence or statement.
6. The structure labeled X in Figure 12-1 is a(an) ____________________.
Figure 12–1
7. The order of nitrogenous bases in DNA determines the order of ____________________ in proteins.
Short Answer
8. In Figure 12-2, which molecule is tRNA, and what is its function?
Figure 12–2
9. According to Figure 12-3, what codons specify the amino acid arginine?
Figure 12–3
Biology Chapter 12 Practice Test DNA/RNa
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
ANS:
ANS:
ANS:
ANS:
ANS:
D
C
B
D
A
REF:
REF:
REF:
REF:
REF:
p. 291
p. 299
p. 300
p. 300
p. 302
COMPLETION
6. ANS: nucleotide
REF: p. 294
7. ANS: amino acids
REF: p. 302
SHORT ANSWER
8. ANS:
Molecule B is tRNA, which carries amino acids to the ribosomes.
REF: p. 301
9. ANS:
AGG, AGA, CGA, CGC, CGU, and CGG specify arginine.
REF: p. 303