BIOENERGETICS - Photosynthesis

Question 1

What Is The Equation For Photosynthesis?

Answer 1

(Above the arrow)______Light
Carbon Dioxide + Water —> Glucose + Oxygen
CO2 H20 C6H12O6 O2

Question 2

How Are Glucose Molecules Produced By Photosynthesis?

Answer 2

Energy is required. This is because the reactions are endothermic (take heat in). This energy needed is supplied by sunlight. It is trapped by chlorophyll which is found in chloroplast

Question 3

How Does Temperature Affect The Rate Of Photosynthesis?

Answer 3

As temperature increases so does rate of photosynthesis. This is because more energy is provided for the reaction. As temperature approaches 45 degrees the rate of photosynthesis drops to 0 because the enzymes controlling photosynthesis have been destroyed.

Question 4

How Does Light Intensity Affect The Rate Of Photosynthesis?

Answer 4

As light intensity increases so does the rate of photosynthesis. This is because more energy is provided for the reaction

Question 5

How Does Carbon Dioxide Concentration Affect The Rate Of Photosynthesis?

Answer 5

As the concentration of carbon dioxide increases so does the rate of photosynthesis. This is because carbon dioxide is needed in the reaction

Question 6

How Does Chlorophyll Affect The Rate Of Photosynthesis?

Answer 6

This does not vary in the short term but may change if plants are grown in soil without enough minerals to make chlorophyll

Question 7

How Is Glucose Used By The Plant During Respiration?

Answer 7

May be used by the plant during respiration to provide energy

Question 8

Products Glucose May Be Changed Into

Answer 8

Insoluble startch which is stored in stem, leaves or roots. Fat or oil which is stored in e.g seeds. Cellulose to strengthen walls. Proteins which are used for growth and for enzymes. To produce proteins, plants also use nitrate ions that are absorbed from the soil