Photosynthesis Flashcards
What is the equation for photosynthesis?
Water+Carbon dioxide—> Glucose+Oxygen
What do plants use photosynthesis for?
To produce their own food, for growth and repair.
What’s ATP?
Adenosine Triphosphate which is a high energy molecule used to link energy requiring and energy releasing reactions.
How do you make ATP?
ADP + Pi —> ATP
Can the reaction to create ATP be reversed?
ATP can be broken down to create ADP + Pi energy which can be used for synthesis reactions
Where is light energy trapped in the first stage of photosynthesis?
The chlorophyll traps light energy to build ATP
What is the ATP used for in the second stage of photosynthesis?
The ATP is broken down to provide energy for the synthesis of glucose
Where is the chlorophyll found?
The chlorophyll is found in the chloroplast
Fill in the blanks
Light energy is absorbed by ————
Water—-> ——-+———-
———+_______—> —————
From the left to the right starting from the top
Light energy is absorbed by chlorophyll
Water -> oxygen + hydrogen
ADP + Pi —> ATP
What is carbon fixation?
Carbon fixation is a series of enzyme-controlled reactions, which use hydrogen and ATP with carbon dioxide to produce glucose
What are sugar, starch and cellulose?
Carbohydrates
What are the uses of sugar in plants?
Carbon dioxide -> sugar -> stored as starch , build up into cellulose for cell walls , used for respiration to release energy
What can carbohydrates produces from photosynthesis also make?
Protein and fat molecules
How can you measure the rate of photosynthesis over time?
Increase in dry mass - leaf discs
Carbon dioxide uptake - CO2 probe / bicarbonate indicator
Oxygen production - oxygen bubbles/ O2 probes / Floating discs
Why is dry mass used?
To avoid measuring the mass of water which fluctuated due to osmosis.
