| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.SL.TZ0.10 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 / no time zone |
| Command term | Identify | Question number | 10 | Adapted from | N/A |
Question
For which discovery about DNA do Watson and Crick receive credit?
A. DNA is the molecule that genes are made of.
B. The amount of adenine equals the amount of thymine in an organism.
C. Phosphate–pentose bonding along the nucleotide backbone is covalent.
D. The shape of DNA is a double helix.
Markscheme
D
Examiners report
Syllabus sections
- 16N.1.SL.TZ0.7: The diagram shows a molecular structure. Which type of molecule is shown? A. Amino acidB....
- 18M.1.SL.TZ1.11: Nucleic acids are polymers of nucleotides. What parts of nucleotides are joined together in...
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18M.2.SL.TZ1.2c:
State two structural features that differ between RNA and DNA.
- 16N.1.SL.TZ0.10: What is a similarity between DNA and RNA? A. Both are polymers of nucleotides.B. Both are...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 18M.2.SL.TZ2.2b.i: Explain how model making helped Watson and Crick to establish the structure of DNA.
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18M.2.SL.TZ2.2a:
Label the parts of the DNA diagram indicated by I, II, III and IV.
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22M.2.HL.TZ1.8a:
Draw a labelled diagram to show the structure of a single nucleotide of RNA.
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22M.2.SL.TZ1.7a:
Draw a labelled diagram to show the structure of a single nucleotide of RNA.
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 21M.1.SL.TZ1.9: The hydrolysis of a pure sample of an organic molecule produces a pentose sugar, thymine,...
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22M.2.HL.TZ2.5a.ii:
Explain how the two strands of the DNA double helix are held together.
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20N.2.SL.TZ0.5a:
Draw a molecular diagram of alpha-D-glucose.
- 19M.2.HL.TZ2.7a: Distinguish between the structures of DNA and RNA.
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
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20N.2.SL.TZ0.4a:
Sketch the complementary strand to complete the section of a DNA diagram.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 22M.1.SL.TZ1.9: A molecule of DNA is found to contain 200 guanine bases, representing 25 % of the total...
- 22M.1.SL.TZ2.11: What is a function of the enzyme helicase? A. It coils DNA up into a double helical...
- 19M.1.HL.TZ1.7: What is common to RNA and DNA? A. Thymine B. Nitrogenous bases C. Histones D. Deoxyribose
- 17M.2.SL.TZ1.5a: Outline how translation depends on complementary base pairing.
- 19N.2.HL.TZ0.6a: Draw the structure of a section of DNA showing all possible bases.
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18M.2.HL.TZ1.6c:
Hydrogen bonds can exist both within and between molecules in living organisms and have an impact on their structure and function. Explain the importance of hydrogen bonding for living organisms.
