Photosynthesis
What are the main reactants of photosynthesis?
Carbon dioxide and water
What happens when ATP loses a phosphate group?
Energy is released → forms ADP.
What organelle is responsible for making most of a cell’s energy (ATP)?
Mitochondria
What do plants release that animals need?
Oxygen
Which tissue in plants moves water upward from roots to leaves?
Xylem
What are the main products?
Glucose and oxygen
Where is most of the energy stored in ATP?
In the bonds between phosphate groups
When oxygen is available, what type of respiration happens?
Aerobic
What do animals release that plants need?
Carbon dioxide
What tissue carries sugars made in leaves to the rest of the plant?
Phloem
What happens to photosynthesis if light intensity increases?
It increases up to a point (more light = faster rate)
Why is ATP called the “energy currency” of the cell?
It transfers/releases energy to power cell functions.
What happens in your muscles when oxygen runs low?
Lactic acid fermentation occurs → muscle fatigue.
How are photosynthesis and respiration connected?
The products of one are the reactants of the other.
What happens to a plant if the xylem is damaged?(explain how it affects photosynthesis)
It can’t transport water, so photosynthesis slows down and leaves wilt.
What organelle does photosynthesis use
chloroplast
Describe one example of a cell process that requires ATP.
Active transport or muscle movement
When yeast runs out of oxygen, what process allows it to keep making ATP?
Alcoholic fermentation
Where does the energy for photosynthesis come from?
the sun
Why does the stomata open and close
They control gas exchange
Predict what happens if a plant doesn’t get enough carbon dioxide.
It can’t make glucose → photosynthesis slows down.
What does ATP stand for?
Adenosine Triphosphate
Compare aerobic respiration and fermentation — how do they differ in oxygen use and ATP amount?
Aerobic uses oxygen and makes ~36 ATP; fermentation doesn’t use oxygen and makes only 2 ATP
Explain what would happen to life on Earth if photosynthesis stopped.
No oxygen or food → most life forms would die.
What happens to photosynthesis when the stomata is closed ?
When closed, less CO₂ enters → photosynthesis decreases.