bio-energetics Flashcards
(21 cards)
Where in a plant cell does photosynthesis take place?
Chloroplasts
How is energy transferred to a plant from its environment for photosynthesis?
Energy is transferred from the environment to the chloroplasts by light.
What is an endothermic reaction?
A reaction where energy is transferred from the environment in the process.
What is the word equation for photosynthesis?
Carbon dioxide + water (and light) = glucose and oxygen
What type of molecule is formed when combining glucose with nitrate ions?
Amino acids
Why do plants store glucose as starch?
As it is easier to store as starch and is ready for times like winter when there is no photosynthesis.
What is meant by a “limiting factor”of photosynthesis ?
Something that is stopping photosynthesis from occurring faster.
What effect would a low carbon dioxide concentration have on the rate of photosynthesis?
It would decrease the rate of photosynthesis
What affect would a temperature above 45 degrees have on the rate of photosynthesis?
It would denature and damage enzymes decreasing the rate of photosynthesis.
In the inverse square law how are light intensity and distance linked ?
Light intensity is proportional to one over distance squared/.
Give ways temperature can be decreased in a greenhouse.
Use shades or ventilation
Give one way the level of Carbon dioxide can be increased inside of a greenhouse.
Use a paraffin heater
What is respiration?
The process of transferring energy from the break down of glucsoe.
What is an exothermic reaction?
a reaction that transfers energy to the environment
Name the products of aerobic respiration
carbon dioxide and water
what is produced by anaerobic respiration in muscle cells?
lactic acid
What is the word equation for anaerobic respiration in yeast cells?
glucose=ethanol and carbon dioxide
Name 2 products of the food and drink industry that fermentation is needed for.
bread+alcohol
Give 3 things that increase to supply the muscles with more oxygenated blood during exercise.
breathing rate,heart rate,breath volume.
What happens to the muscles when they become fatigued?
get tired and stop contracting efficiently
In what organ is lactic acid converted back to glucose?
liver
