Theory question 101
Cell Structure and Organisation(a)(i) List three forms in which living cells exist. (ii) Give one example each of the forms listed in 1(a)(i). (b) Make a diagram, 6 cm – 10 cm long, of a typical plant cell and label fully. (c)(i) In a tabular form, state three differences between a plant cell and an animal cell. (ii) State three similarities between a plant cell and an animal cell.
Show the model answer
(a)(i) Any three: as single free-living cells; as colonies; as filaments; as part of a many-celled organism (tissues).
(ii) Single: Amoeba, Euglena, Chlamydomonas, Paramecium. Colony: Volvox, Pandorina, Eudorina. Filament: Spirogyra, Ulothrix, Oedogonium. Part of an organism: cheek cell, onion epidermal cell.
(b) Diagram 6–10 cm long with a title, showing and labelling: cellulose cell wall, cell membrane, cytoplasm, large central vacuole with tonoplast, nucleus (with nucleolus), chloroplasts, mitochondria; extra marks for middle lamella, endoplasmic reticulum, Golgi body. Clean lines and ruled label lines.
(c)(i) Any three in a table: plant cell has a cellulose cell wall / animal cell has none; plant has chloroplasts / animal has none; plant has one large central vacuole / animal has small or no vacuoles; plant stores starch / animal stores glycogen; plant cell has a regular shape / animal cell irregular; plant lacks centrioles / animal has centrioles.
(ii) Any three: both have a cell membrane; both have cytoplasm; both have a nucleus; both have mitochondria, ribosomes, endoplasmic reticulum and Golgi bodies.
Draw large and in pencil, keep the drawing within the size asked, and give it a title.