Question detail
Which of the following best describes polypeptides?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of alkenes and alcohols (chemistry only)
Question
- A. Amino acids linked by ionic bonds
- B. Long chains of nucleotides
- C. Chains of amino acids linked by peptide bonds
- D. Simple sugars linked by glycosidic bonds
Answer
The correct option is Chains of amino acids linked by peptide bonds.
Explanation
The correct option is Chains of amino acids linked by peptide bonds. Chains of amino acids linked by peptide bonds is correct because it directly supports the approved learning objective to amino acids react by condensation polymerisation to produce polypeptides. (HT only). This belongs to Polymerisation and naturally occurring polymers within Reactions of alkenes and alcohols (chemistry only), so the answer must use the correct organic chemistry context. The other options are incorrect when they confuse the organic family, formula type, reaction condition, product, or property being tested. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.
Common mistake
Confusing Polymerisation Types
Students often confuse condensation polymerisation with addition polymerisation, thinking they are the same process.
Remember that condensation polymerisation involves the loss of small molecules like water, while addition polymerisation does not produce any by-products.
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