Bioenergetics Flashcards
Equation for photosynthesis
Carbon dioxide + Water ———-> Glucose + Oxygen
Equation for respiration
Glucose + Oxygen ———–> Carbon Dioxide + Water
After 10 minutes the limewater in flask B was cloudy, but the limewater in flask A remained colourless. Explain why
atmospheric air contains less carbon dioxide than exhaled air
carbon dioxide is produced in (aerobic) respiration (by
woodlice)
Exercise cannot be sustained when anaerobic respiration takes place in muscle cells. Explain why.
muscles become fatigued / stop contracting
because not enough energy is transferred
Explain how oxygen passes through the blood
diffusion, high to low concentration, through (cell) membrane/cytoplasm
The pancreas cell makes enzymes. Enzymes are proteins. Describe how the ribosomes and mitochondria help the cell to make enzymes.
ribosomes make proteins / enzymes
using amino acids
mitochondria provide the energy for the process
During exercise, more oxygen is carried to the working muscles.
Explain why this is helpful during exercise.
for respiration
prevents anaerobic respiration
prevents build-up of lactic acid