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Biology Chapter 12 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 RNA?
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 RNA, DNA 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 six amino acids?
a. 3
c. 9
b. 6
d. 12
6. Avery’s experiments showed that bacteria are transformed by
a. RNA.
c. proteins.
b. DNA.
d. carbohydrates.
7. DNA is copied during a process called
a. replication.
c. transcription.
b. translation.
d. transformation.
8. In eukaryotes, DNA
a. is located in the nucleus.
c. is located in the ribosomes.
b. floats freely in the cytoplasm.
d. is circular.
9. RNA contains the sugar
a. ribose.
c. glucose.
b. deoxyribose.
d. lactose.
10. What does Figure 12-6 show?
Figure 12-6
a. anticodons
b. the order in which amino acids are linked
c. the code for splicing mRNA
d. the genetic code
____ 11. Genes contain instructions for assembling
a. purines.
b. nucleosomes.
c. proteins.
d. pyrimidines.
Completion
Complete each sentence or statement.
12. The structure labeled X in Figure 12-1 is a(an) ____________________.
Figure 12–1
13. The order of nitrogenous bases in DNA determines the order of ____________________ in proteins.
14. In Figure 12-7, A, B, and C are three types of ____________________.
Figure 12–7
Short Answer
15. In Figure 12-2, which molecule is tRNA, and what is its function?
Figure 12–2
16. According to Figure 12-3, what codons specify the amino acid arginine?
Figure 12–3
17. What must happen to a DNA molecule before RNA polymerase can make RNA?
18. Identify the RNA formed from the following DNA sequence: ACCTGAGAT
19. Using Fig 12.3 to determine the amino acids specified by the following tRNA sequence:
CUGAAATCG
Biology Chapter 12 TEST DNA/RNa
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
ANS:
ANS:
ANS:
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ANS:
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ANS:
B
C
D
D
B
B
A
A
A
D
C
REF:
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REF:
p. 291
p. 299
p. 300
p. 300
p. 302
p. 289
p. 297
p. 295
p. 300
p. 303
p. 306
COMPLETION
12. ANS: nucleotide
REF: p. 294
13. ANS: amino acids
REF: p. 302
14. ANS: RNA
REF: p. 300
SHORT ANSWER
15. ANS:
Molecule B is tRNA, which carries amino acids to the ribosomes.
REF: p. 301
16. ANS:
AGG, AGA, CGA, CGC, CGU, and CGG specify arginine.
REF: p. 303
17. ANS:
The DNA molecule must be separated into two strands.
REF: p. 301
18. ANS:
UGGACUCUA
19. ANS:
rth