Bioenergetics Flashcards
What are the three main limiting factors?
Light, temperature and CO2 level
What are the five ways that plants use glucose?
For respiration convert, making cellulose, making amino acids, storing as oil or fats and storing as starch
How can chlorophyll level be a limiting factor?
Disease or environmental stress can cause chloroplasts to become damaged or not make enough chlorophyll
What is the inverse square law?
Light intensity ∝ 1 / distance²
What does the inverse square law mean?
That if you half the distance, the light intensity will be four times greater or if you third the distance, the light intensity will be nine times greater etc.
How is light intensity measured?
1/d²
Why can a greenhouse be an ideal environment for plants?
It traps the suns heat,it is easier to protect the plants from pests, you can install artificial light and you can use a paraffin heater to release CO2
What is respiration?
The process of transferring energy from glucose which goes on in every cell
Give three examples of how organisms use the energy transferred by respiration
To build up larger molecules form smaller ones, to allow muscles to contract and to keep body temperature steady in cooler surroundings
What is metabolism?
The sum of all the reactions that happen in a cell or the body
What is the most efficient way of transferring energy from glucose?
Aerobic respiration
What is the symbol equation for aerobic respiration?
C6H12O6 + 6O2 —–> 6CO2 + 6H2O
What is anaerobic respiration?
The incomplete breakdown of glucose
What is the word equation for anaerobic respiration in muscle cells?
Glucose —–> lactic acid
What is the word equation for anaerobic respiration in plants and yeast cells?
Glucose —–> ethanol + carbon dioxide
