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Combined Science: Biology

GCSE · Edexcel · foundation

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  3
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  7
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  4
Cycles within Ecosystems

Rate Calculations for Enzyme Activity Flashcards

All 3 cards in this deck

What equation gives the rate of an enzyme reaction from the amount of product formed?: rate = amount of product formed ÷ time taken, e.g. in cm³/s
What equation gives the rate of a reaction from the time it takes to finish (e.g. until the starch has gone)?: rate = $1 \div \text{time}$ , with units of $\text{s}^{-1}$ (per second)
True or false? A shorter time taken to collect a fixed volume of product means a faster rate of reaction.: True. Rate is inversely proportional to time, so less time means a faster rate.