A Levels Biology (9700)•9700/12/O/N/23

Explanation
Organelles with Nucleic Acids
Steps:
- Identify nucleic acids as DNA and RNA, essential for genetic information and protein synthesis.
- Recall organelles: nucleus houses DNA; mitochondria and chloroplasts contain DNA; ribosomes have RNA.
- Eliminate options lacking these molecules, like endoplasmic reticulum or Golgi apparatus.
- Select the option listing nucleus, mitochondria, and/or ribosomes.
Why D is correct:
- D includes organelles like the nucleus and ribosomes, which by definition store DNA/RNA as genetic material.
Why the others are wrong:
- A lacks organelles with DNA or RNA, focusing on membrane-bound structures without nucleic acids.
- B omits key nucleic acid-containing organelles like the nucleus.
- C includes incorrect options, such as lysosomes, which do not contain nucleic acids.
Not enough information on exact choices A–C.
Final answer: D
Topic: Structure of nucleic acids and replication of DNA
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