Question 1
Which list shows the levels of organisation in order, from smallest to largest?
- cell, organelle, tissue, organ, system
- organelle, cell, tissue, organ, system
- organelle, tissue, cell, system, organ
- tissue, organelle, cell, organ, system
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Answer: B (1)
Question 2
The stomach is an organ in the digestive system. (a) Explain why the stomach is called an organ. (b) Name one other organ in the digestive system.
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- it is made of several / different tissues (1)
- that work together to perform a specific function / digest food (1)
- (b) any one from: small intestine / large intestine / oesophagus / pancreas / liver (1) allow other correct organs of the system
Question 3
State the function of each of these cell structures. (a) nucleus (b) mitochondria (c) ribosomes (d) cell membrane
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- (a) contains the genetic material / DNA and controls the activities of the cell (1)
- (b) (site of) aerobic respiration / releases energy (1)
- (c) (site of) protein synthesis / where proteins are made (1)
- (d) controls the movement of substances into and out of the cell (1)
Question 4
Name three structures that are found in a palisade mesophyll cell from a leaf but not in a cell from the lining of the human stomach.
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- cell wall (1)
- chloroplasts (1)
- (large / permanent) vacuole (1)
- allow cellulose cell wall; ignore cell sap on its own