Bioenergetics

Question 1

PHOTOSYNTHESIS REACTION

• Carbon Dioxide + Water —> Glucose + Oxygen
• 6CO2 + 6H2O → C6H12O6 + 6O2

Answer 1

RATE OF PHOTOSYNTHESIS

• Affected by light intensity, CO2 concentration, temperature.
• They become limiting factors: they can stop photosynthesis from happening any faster.
• Combined effect on rate of photosynthesis.
• At night it is the light, winter it is the temperature, when warm and bright it is the amount of CO2.
• Chlorophyll can also be a limiting factor: amount can be effected by disease or environmental stress.

Question 2

USE OF GLUCOSE IN PLANTS

• Respiration: transfers energy to glucose so other glucose can be used in other substances.
• Make Cellulose: to make strong plant cell walls.
• Make Amino Acids: combined with nitrate ions to make amino acids which are made into proteins.
• Stored as Oils/Fats: turned into lipids for storing seeds.
• Stored as Starch: stored in roots, stems, leaves, it is insoluble as it doesn’t draw in loads of water.

Answer 2

AEROBIC AND ANAEROBIC

-Aerobic: •Respiration using oxygen
•Glucose + Oxygen —> Carbon Dioxide + Water

-Anaerobic: •Respiration without oxygen
•Vigorous exercise, can’t get enough oxygen to the muscles
•Glucose —> Lactic Acid

Question 3

RESPONSE TO EXERCISE

• Respire more.
• Muscles need energy from respiration to contract.
• Need more energy as the contract more.
• HR increases to get more oxygen in the blood.

Answer 3

METABOLISM

• All the chemical reactions in an organism.
• Lots of chemical reactions controlled by enzymes.
• Sum of all reaction in cell/body is called it’s metabolism.