The correct answer is A. the change in pH affects the shape and function of the enzyme. It can only function properly in its optimal pH range.
Enzymes are protein molecules and they have a specific shape, which is altered by temperatures and pH that are not within the enzyme's range of operation. This is because the temperature and pH alter the enzyme's structure, which means the shape of its active site is changed and its substrate is not able to fit inside the active site of the enzyme molecule.
the Ozone Layer is the answer
-Genetically modified crops :weather and disease resistant meaning more crops and more food available ensuring food security for many counties
- Vaccinations : immunisation from diseases that previously proved deadly
- Fertility assistance ,prenatal scanning, home pregnancy tests
-research into Alzheimer’s
- provided cancer and heart disease treatment
- enabled growing of organs so waiting lists for transplants get shorter and more lives are saved
I think it is D I’m not sure
