25. Which of the following is TRUE about ribosomes? A. They are membrane-bounded organelles.
B. They synthesize carbohydrate.
C. All ribosomes are bound to endoplasmic reticulum.
D. They synthesize proteins.
E. They consist of DNA and proteins.
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D.

Explanation:

They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.

What structures are present in a plant cell but not in an animal cell?

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.

Explanation: