Mrs. Knight
Biology I
EHS
Class Copy
Unit 5 Test: DNA and RNA
1. Figure 1 shows the structure of a(n)
A. DNA molecule
C. RNA molecule
B. amino acid
D. protein
2. The structure labeled X in Figure 1 is a(an)
A. DNA nucleotide
C. amino acid
B. RNA nucleotide
D. protein
3. Which of the following is a DNA nucleotide?
A. ribose + phosphate group + thymine
B. ribose + phosphate group + uracil
C. deoxyribose + phosphate group + uracil
D. deoxyribose + phosphate group + cytosine
Figure 1
4. In Eukaryotes, DNA
A. is located in the nucleus.
B. floats freely in the cytoplasm.
C. is located in the ribosomes.
D. is circular.
5. On a DNA molecule, if one strand has the bases CTAGGT, the other strand is
A. TCGAAC
B. GATCCA
C. AGCTTG
D. GAUCCA
6. RNA contains the sugar
A. ribose
B. deoxyribose
7. Unlike DNA, RNA contains
A. adenine
B. uracil
C. glucose
C. phosphate groups
8. Which of the following are found in both DNA and RNA?
A. ribose, phosphate groups, and adenine
B. deoxyribose, phosphate groups, and guanine
C. phosphate groups, guanine, and cytosine
D. phosphate groups, guanine, and thymine
9. During transcription, an RNA molecule is formed
A. that is complementary to both strands of DNA.
B. that is identical to part of a single strand of DNA.
C. that is double-stranded.
D. inside the nucleus.
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D. lactose
D. thymine
10. How many codons are needed to specify one amino acid?
A. 1
B. 2
C. 3
D. 4
11. What happens during the process of translation?
A. Messenger RNA is made from DNA.
B. The cell uses information from messenger RNA to produce proteins.
C. Transfer RNA is made into messenger RNA.
D. Copies of DNA molecules are made.
12. Genes contain instructions for assembling
A. purines
B. nucleosomes
C. proteins
D. pyrimidines
13. The Watson and Crick model of DNA is a …
A. helix
C. single stranded molecule
B. double helix
D. mirrored ladder
14. During transcription,
A. proteins are synthesized
B. DNA is replicated
C. mRNA is produced
D. translation occurs
15. Each nucleotide triplet in mRNA that specifies a particular amino acid is a(n)
A. mutagen
C. anticodon
B. codon
D. exon
16. What percentage of adenine molecules is present in a DNA if 20% of the base
molecules are cytosine?
A. 20%
B. 30%
C. 40%
D. 50%
17. For mRNA: CUCAAGUGCUUC, what is the portion of the protein molecule?
A. Serine – Tyrosine – Arginine – Glycine
B. Valine – Asparagine – Proline – Histidine
C. Leucine – Lysine – Cysteine – Phenylalanine
D. Proline – Glutamine – Leucine – Valine
18. Which of the following would represent the strand of DNA from which the mRNA
was made?
A. CUCAAGUGCUUC
B. GAGUUCACGAAG
C. GAGTTCACGAAG
D. AGACCTGTAGGA
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19. Suppose that you are given a protein containing the following sequence of amino
acids: tyrosine, proline, aspartic acid, isoleucine, and cysteine. Which of the following
contains a DNA sequence that codes for this amino acid sequence?
A. AUGGGUCUAUAUACG
B. ATGGGTCTATATACG
C. GCAAACTCGCGCGTA
D. ATAGGGCTTTAAACA
20. Which of the following choices correctly identifies DNA?
A. adenosine triphosphate
C. chromosome karyotype
B. ribonucleic acid
D. deoxyribonucleic acid
21. Which type of bond connects the nitrogen bases in DNA?
A. ionic
B. hydrogen
C. covalent
D. metallic
22. Which of the following bases are Purines?
A. adenine and guanine
C. cytosine and guanine
B. adenine and thymine
D. uracil and thymine
23. A mutation in which one nucleotide in a gene is replaced with a different nucleotide
is called
A. a deletion
B. point mutation
C. frameshift
D. an insertion
Matching: Processes
24. copies DNA
A. replication
25. DNA makes RNA
B. transcription
26. RNA makes proteins
C. translation
Matching: RNA
27. codes for amino acid
A. mRNA
28. forms part of ribosome
B. rRNA
29. brings amino acids from the cytoplasm
to a ribosome to help make protein
C. tRNA
30. Any change in DNA sequence is called a _?_.
A. mutation
C. transcription
B. replication
D. translation
31. Adenine : Thymine
A. Protein : DNA
B. Watson : Crick
C. Guanine : Cytosine
D. Adenine : DNA
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32. A gamete mutation
A. Can alter the genes of the sperm
B. Can alter the genes of the egg
C. Does not affect sex cells
D. Choice A and B only
E. All of the above choices
33. Consider the base sequence:
ACGGATTCATTATA
What kind of mutation has occurred here: ACGGTTCATTATA
A. Deletion B. Inversion C. Duplication D. Translocation
TGCCTAAGTAATAT
TGCCAAGTAATAT
E. Substitution
34. What enzyme is responsible for opening the double helix and breaking the hydrogen bonds
between the nitrogen bases?
A. DNA Polymerase
C. DNA Ligase
B. DNA Helicase
D. DNA Primase
35. The codon for leucine is CUC. How many different amino acids could possibly result from
single-base substitutions?
A. 1
B. 3
C. 5
D. 7
36. What is the name of the enzyme that moves along each of the DNA strands during
replication adding nucleotides to the exposed base pairs. Also, it proofreads the new
DNA during replication.
A. DNA Polymerase
B. DNA Helicase
C. DNA Ligase
D. DNA Primase
Matching: Chromosomal Mutations
37. duplication
A. A.
38. deletion
39. translocation
B.
40. inversion
C.
D.
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