GCE 'O' Level Biology Theme 1
3.1 (5 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
714 students enrolled

GCE 'O' Level Biology Theme 1

Cell Structure and Organisation, Movement of Substances and Biological Molecules
3.1 (5 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
714 students enrolled
Created by Murali Kanasappa
Last updated 3/2015
English
English [Auto]
Current price: $12.99 Original price: $19.99 Discount: 35% off
14 hours left at this price!
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This course includes
  • 31 mins on-demand video
  • 1 downloadable resource
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
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What you'll learn
  • demonstrate knowledge and understanding in relation to scientific phenomena, facts, laws, definitions, concepts, theories;
  • scientific instruments and apparatus, including techniques of operation and aspects of safety;
  • scientific quantities and their determination;
  • scientific and technological applications with their social, economic and environmental implications.
  • scientific vocabulary, terminology, conventions (including symbols, quantities and units contained in ‘Signs, Symbols and Systematics 16–19’, Association for Science Education, 2000 and the recommendations on terms, units and symbols in ‘Biological Nomenclature 4th Edition (2009)’ published by the Institute of Biology, in conjunction with the Association for Science Education);
Requirements
  • No material or software is required
Description

This course is designed to provide studies of experimental and practical Biology, a worthwhile educational experience for all students, whether or not they go on to study science beyond this level and, in particular, to enable them to acquire sufficient understanding and knowledge to be suitably prepared for studies beyond Ordinary Level in Biology. Each course consists of one theme of biology that will be further split into simpler topics for easier understanding. This course is designed to stimulate students, create and sustain their interest in Biology, and understand its relevance to society.

Candidates will be assumed to have knowledge and understanding of 'O' level Biology, as a single subject or as part of a balanced science course

Who this course is for:
  • Students who are taking O Levels Biology (SPA)
Course content
Expand all 5 lectures 31:11
+ Cell Structure and Organisation
2 lectures 11:43
  1. identify cell structures (including organelles) of typical plant and animal cells from diagrams, photomicrographs and as seen under the light microscope using prepared slides and fresh material treated with an appropriate temporary staining technique: chloroplasts, cell surface membrane, cell wall, cytoplasm, cell vacuoles, nucleus

  2. identify the following membrane systems and organelles from diagrams and electron micrographs: endoplasmic reticulum, mitochondria, Golgi body, ribosomes
  3. state the functions of the membrane systems and organelles identified above

  4. compare the structure of typical animal and plant cells
Preview 08:22
Identifying cell structures and organelles
4 questions
  1. state, in simple terms, the relationship between cell function and cell structure for the following: absorption – root hair cells, conduction and support – xylem vessels, transport of oxygen – red blood cells
  2. differentiate cell, tissue, organ and organ system
Preview 03:21
+ Movement of substances
1 lecture 06:57
  1. define diffusion and describe its role in nutrient uptake and gaseous exchange in plants and humans

  2. define osmosis and describe the effects of osmosis on plant and animal tissues

  3. define active transport and discuss its importance as an energy-consuming process by which substances are transported against a concentration gradient, as in ion uptake by root hairs and uptake of glucose by cells in the villi
Diffusion, osmosis and active transport
06:57
Movement of transport
4 questions
+ Biological molecules
2 lectures 12:31
  1. state the roles of water in living organisms

  2. list the chemical elements which make up carbohydrates, fats, proteins

  3. describe and carry out tests for starch (iodine in potassium iodide solution), reducing sugars (Benedict's solution), protein (biuret test), fats (ethanol emulsion)

  4. state that large molecules are synthesised from smaller basic units: glycogen from glucose, polypeptides and proteins from amino acids, lipids such as fats from glycerol and fatty acids
Water, carbohydrates, fats and proteins
06:55
Biological molecules
4 questions
  1. Explain enzyme action in terms of the 'lock and key' hypothesis.
  2. Explain the mode of action of enzymes in terms of an active site, enzyme-substrate complex, lowering of activation energy and enzyme specificity.
  3. Investigate and explain the effects of temperature and pH on the rate of enzyme catalyzed reactions.
Enzymes
05:36
Enzymes
2 questions