Download Provincial Exam Questions

Biology 12
Provincial Exam Questions
Unit: Cell Biology: DNA Replication (B5 & B6)
2010 Jan
6. DNA from different species is joined during
A. translation.
B. replication.
C. transcription.
D. recombination.
7. Which of the following occurs during complementary base pairing?
A. Bonds form between uracil and thymine.
B. Bonds form between cytosine and guanine.
C. Bonds break between phosphates and sugars.
D. Bonds break between amino acids and phosphates.
8. Which of the following is produced as a result of replication?
A. DNA
B. protein
C. mRNA
D. ribosomes
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9. In which of the following are both helicase and DNA polymerase active?
A. X only
B. Y only
C. Z only
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D. X and Z
2010 Sample
Same as 2009 sample
2009 Sample
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7. If 20% of the base molecules are guanine, how many thymine molecules are present in
a DNA
molecule with 1000 bases?
A. 200
B. 300
C. 400
D. 600
2009 June
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12. Which of the following is occurring at X?
A. bonds between bases are breaking
B. bases are joining by hydrogen bonding
C. bonds between the sugar and phosphate are forming
D. bonds between the ribose and phosphate are breaking
13. Which of the following enzymes catalyzes the process illustrated above?
A. maltase
B. helicase
C. nuclease
D. peptidase
14. Which of the following occurs during complementary base pairing?
A. Bonds form between uracil and thymine.
B. Bonds form between cytosine and guanine.
C. Bonds break between phosphates and sugars.
D. Bonds break between amino acids and phosphates.
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15. The sequence of bases in one strand of a DNA molecule is CCGTAC. Which of the
following represents the sequence of bases that attach to this strand during replication?
A. GGCATG
B. GGCUTG
C. CCGTAC
D. GGCAUG
2008 Aug
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10. Which enzyme breaks the bond indicated by X?
A. pepsin
B. helicase
C. nuclease
D. DNA polymerase
2007 Aug
1. (3 marks)
Describe the steps involved when a DNA molecule is copied.
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12. X and Y could represent which of the following?
A. adenine and uracil
B. guanine and cytosine
C. cytosine and adenine
D. thymine and thymine
2006 Aug
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12. What type of chemical bond is indicated by X?
A. ionic
B. peptide
C. covalent
D. hydrogen
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13. DNA is a molecule of which of the following?
A. ribose
B. nucleotides
C. amino acids
D. nucleic acids
14. Which of the following are characteristics of a DNA molecule?
A. single helix, ribose, guanine
B. double helix, ribose, adenine
C. single helix, deoxyribose, uracil
D. double helix, deoxyribose, thymine
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15. In which step do new bases attach by complementary base pairing?
A. W
B. X
C. Y
D. Z
16. The sequence of bases in one strand of a DNA molecule is CCGTAC. Which of the
following represents the sequence of bases created on this strand during replication?
A. CCGTAC
B. GGCUTG
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C. GGCATG
D. GGCAUG
17. What has occurred when the sequence of DNA bases is altered during replication?
A. mutation
B. translation
C. denaturation
D. transcription
2005 Aug
14. Which of the following is the second step of replication?
A. the formation of two new DNA molecules
B. complementary base pairing of nitrogenous bases
C. the breaking of hydrogen bonds between nitrogenous bases
D. the joining of bonds between the sugar and phosphate backbone
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15. Which of the above illustrates the result of replication?
A. W
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B. X
C. Y
D. Z
16. Where does this process take place?
A. the nucleus
B. the ribosome
C. the nucleolus
D. the Golgi body
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