Cambridge AS & A Level Biology
ASAS Level subject content
Overview
Topics 1-11: studied by all candidates; examined in Papers 1 and 2 and assumed knowledge for Paper 4.
In this topic
Lessons
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The fluid mosaic model and cell signalling
30 min
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Cholera and tuberculosis
35 min
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HIV and AIDS
35 min
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Malaria: transmission, distribution and control
35 min
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How enzymes work
35 min
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Chromosomes and the cell cycle
30 min
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Uncontrolled cell division and cancer
30 min
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Nucleotides and the structure of DNA and RNA
35 min
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Semi-conservative replication of DNA
35 min
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Xylem and phloem: structure, distribution and plan diagrams
35 min
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Tests for biological molecules
35 min
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The mammalian circulation, blood vessels and tissue fluid
40 min
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The human gas exchange system
40 min
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Phagocytes, lymphocytes and the immune response
35 min
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Microscopes, magnification and resolution
35 min
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Antibiotics and antibiotic resistance
30 min
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Antibodies and monoclonal antibodies
30 min
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Types of immunity and vaccination
30 min
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Monosaccharides, disaccharides and glycosidic bonds
30 min
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Starch, glycogen and cellulose
30 min
21 more lessons in this topic. Join to read every lesson, or see what Full access includes.
Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
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