Paper 3 · November 2023 · Cell Structure and Membranes
Which correctly distinguishes a lysosome from a ribosome?
ABoth a lysosome and a ribosome are bounded by a double membrane and contain hydrolytic enzymes.
BNeither a lysosome nor a ribosome is involved in the digestion or synthesis of cell contents.
CA lysosome is bounded by a single membrane and contains hydrolytic enzymes; a ribosome has no surrounding membrane and is the site of protein synthesis.
DA lysosome has no surrounding membrane and is the site of protein synthesis; a ribosome is bounded by a single membrane and contains hydrolytic enzymes.
Explanation
A lysosome is a single-membrane sac of hydrolytic enzymes used for intracellular digestion; a ribosome carries no membrane at all and is built of rRNA and protein for translating mRNA into polypeptide.
Derived from ZIMSEC Biology 6030/3 Paper 3, November 2023, Q1