Question detail
Which of the following is NOT a component of a nucleotide that makes up DNA?
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. Phosphate group
- B. Ribose sugar
- C. Nitrogenous base
- D. Deoxyribose sugar
Answer
The correct option is Ribose sugar.
Explanation
The correct option is Ribose sugar. Ribose sugar is correct because it directly supports the approved learning objective to dNA is a large molecule essential for life. 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 DNA with RNA
Students often confuse DNA with RNA, thinking they are the same molecule.
Remember that DNA is a double-stranded molecule that stores genetic information, while RNA is usually single-stranded and plays a role in protein synthesis.
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