Cell membrane is selectively permeable, while cell wall is freely permeable. RER has ribosomes attached, while SER lacks them. Chloroplasts contain green chlorophyll, while chromoplasts have red, yellow or orange pigments.
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Water moves into Cell X in pure water, causing swelling and moves out of Cell Y in salt solution, causing shrinking. The correct explanation is option (iii).
Renu is correct because all plant cells, including roots, contain plastids. Roots have leucoplasts for storage, even though they lack chloroplasts for photosynthesis.
The correct answer is (ii) Mitochondria and Nucleus because both contain DNA. Other options are incorrect since ribosomes, Golgi bodies and lysosomes do not contain DNA.
The incorrect pair is (ii) SER — Lipid and cellulose synthesis because SER synthesises lipids but not cellulose. Ribosomes make proteins and lysosomes digest materials correctly.