Theory question 101
Cell Structure and Organisation(a)(i) What is a cell? (ii) Name three scientists that are associated with the discovery of the cell.
(b)(i) Make a diagram, 6 cm to 8 cm long of a plant cell and label only the organelle responsible for cell reproduction.
(ii) Name one blood cell in humans that does not have the organelle labelled in 1(b)(i).
(iii) What is the biological implication of the cell named in 1(b)(ii) not possessing the organelle responsible for cell reproduction?
(c) List six organelles found in a plant cell.
Show the model answer
(a)(i) A cell is the basic structural and functional unit of life; the smallest unit that can carry out all life processes.
(ii) Any three: Robert Hooke; Anton van Leeuwenhoek; Matthias Schleiden; Theodor Schwann; Rudolf Virchow; Felix Dujardin.
(b)(i) Diagram of correct size, roughly rectangular plant cell with cell wall, cell membrane, cytoplasm, large vacuole and chloroplasts drawn; only the nucleus labelled; title.
(ii) Red blood cell (erythrocyte).
(iii) It cannot divide/reproduce or repair itself, so it has a short life (about 120 days) and must be constantly replaced by the bone marrow; (lack of nucleus gives more room for haemoglobin to carry oxygen).
(c) Any six: nucleus; chloroplast; mitochondrion; vacuole; endoplasmic reticulum; ribosome; Golgi body; cell membrane; (lysosome).
Label only the nucleus in (b)(i), as the question asks.