Chap 8 - Photosynthesis Flashcards
What is the formula for photosynthesis?
Carbon dioxide + water = glucose + oxygen
Is starch a short or long-term energy store?
Long-term energy store
What do you use to test a leaf for starch?
Iodine
Is photosynthesis an endo or exothermic reaction?
Endothermic reaction (light energy)
Give the 3 limiting factors of photosynthesis?
Light intensity, temperature, carbon dioxide
Define a limiting factor?
A substance in short supply which prevent photosynthesis occurring at its maximum rate
Give 3 uses of glucose?
Starch and other sugars, protein synthesis (amino acids), respiration where glucose is broken down using oxygen to provide energy for cell
What is lipid synthesis used for?
Waxy cuticle of leaf and to store energy in cells
How do venus fly traps survive in poor nutrient areas?
Flys are caught and digested by amino acids for nutrients such as protein
What effect does a lack of nitrate ions have on plants?
Nutrients are needed to make amino acids which are needed for protein s and growth for the plant
What are ideal conditions for a plants growth?
Water, carbon dioxide, light intensity, oxygen, humidity, temperature
What is a poly tunnel?
A mobile greenhouse
Give 2 advantages and 2 disadvantages of a poly tunnel?
It is easy to move and also a lot cheaper (no maintenance cost), no control of internal environment and prone to fungal infections
What is respiration?
Generating an energy compound (ATP), NOT BREATHING
Do cheek cells have more mitochondria than a muscle cell?
No, the more work the cell does the more mitochondria it will have
