mock feedback yr 11

• what is the leaf tissue that contains the most chloroplasts?

  the palisade mesophyll tissue
• 3 features of the alveoli that help to maximise gas exchange?

  • good blood supply
  • thin membrane walls to reduce diffusion distance
  • large surface area
• where in a cell are genes found?

  nucleus
• explain why putting pressure on the heart helps the person

  pushes blood to get oxygen around the body
• explain the effect on increasing the temperature and increasing carbon dioxide concentration on the rate of photosynthesis

  • increasing temperature whilst keeping co2 concentration constant will increase the rate of photosynthesis
  • as increasing temp will increase the movement of molecules, and increase the rate of enzyme activity
  • increasing the co2 concentration whilst keeping temperature constant will increase the rate of photosynthesis, as the concentration of the substrate increases
  • all rates eventually plateau, due to another factor being limiting
• what is involved in the preclinical testing of drugs?

  testing the drugs on live tissues in a laboratary
• give a reason why a drug that stops cell division helps to treat cancer

  as tumours cannot grow