Practice Questions
1.State three reasons why it is important to test drugs
To check the drug is safe and not toxic.
To check its efficacy to see if it is effective (works)
To find the optimal dose, or lowest dose that is effective.
2. What is often the original source for a drug?
Plants and microorganisms
3. What is a double blind trial?
Neither the patient or the doctor knows who will receive the trial drug or the placebo.
Factors affecting the rate of photosynthesis
Measuring & calculating rates of photosynthesis
Inverse square law and photosynthesis
Economics of enhancing the conditions in greenhouses
Investigating the effect of light intensity on the rate of photosynthesis