bioenergetics

• uses of photosynthesis?

  releases energy in respiration

  makes amino acids
• how is energy for photosynthesis gained by plants?

  light energy absorbed by chlorophyll
• required practical for photosynthesis steps:

  take boiling tube + place 10 cm away from light energy source

  place cut pondweed in boiling tube w/ cut end at top

  leave for 5 mins

  stop stopwatch and count bubbles per minute

  calculate mean
• 2 reasons why rate of water loss in both plants changed after 2.5 hours?

  warmer or less humid

  light intensity was increased
• one possible cause of an anomalous result?

  mis reading of value

  lamp moved
• why mitochondria is important in cells?

  requires energy, aerobic respiration
• why does heart rate increase during exercise?

  increase blood flow

  supply more glucose for respiration

  supply more energy to muscles
• compare anaerobic respiration in yeast cell to anaerobic respiration in muscle cell?

  both release small amounts of energy

  yeast produces co2 muscle cells do not