Bioenergetics Flashcards
What is the word equation for Photosynthesis?
Carbon Dioxide + Water => Oxygen + Glucose
What are the chemical symbols for these molecules:
1) Water
2) Carbon Dioxide
3) Oxygen
4) Glucose
1) H(2)O
2) CO(2)
3) O(2)
4) C(6)H(12)O(6)
Photosynthesis is affected by limiting factors.
What is meant by the term ‘limiting factor’?
A factor which is not at an optimum level to enable maximum rate of photosynthesis e.g. temperature
Name the raw materials needed by a plant for photosynthesis?
Carbon dioxide and water
Name the green pigment present in plant cells.
Chlorophyll
What is the role of this green pigment?
To transfer energy from the environment and use it to synthesise glucose from carbon dioxide and water.
List three ways commercial farmers improve the environmental conditions in large greenhouses to maximise photosynthesis and ensure
they make a profit.
Increase the air temperature with heaters.
Provide artificial lighting to supplement the sunlight and through the
night.
Increase the amount of carbon dioxide in the atmosphere.
List three ways glucose produced by photosynthesis is used in plants?
Used for respiration; used to produce fats or oils for storage; used to
produce amino acids for protein synthesis; converted into insoluble starch
for storage; used to produce cellulose to strengthen cell walls.
Calculate the light intensity for the following student data.
Distance of lamp from pond weed (m): 1) 0.3 2) 0.5 Use the formula: Light Intensity α 1/ distance(2)
Light Intencity
1) 11.11
2) 4
When does respiration occur in cells?
Continuously
Is Oxygen required for:
1) Aerobic Respiration
2) Anaerobic respiration in animal cells
3) Anaerobic respiration in plant and yeast cells
1) Yes
2) No
3) No
What are the end products of:
1) Aerobic Respiration
2) Anaerobic respiration in animal cells
3) Anaerobic respiration in plant and yeast cells
1) Carbon dioxide and water
2) Lactic acid
3) Ethanil and Carbon dioxide
Is oxidation of glucose complete or incomplete in:
1) Anerobic Respiration
2) Anaerobic respiration in animal cells
3) Anaerobic respiration in plant and yeast cells
1) complete
2) incomplete
3) incomplete
Is efficiency of energy transfer high or low in:
1) Aerobic Respiration
2) Anaerobic respiration in animal cells
3) Anaerobic respiration in plant and yeast cells
1) high
2) low
3) low
Name three processes that organisms require energy for.
Chemical reactions to build larger molecules, keeping warm and
movement.
What does the chemical formula C(6)H(12)O(6) represent?
Glucose
Write down the word equation for aerobic respiration in a plant cell.
glucose + oxygen ==> carbon dioxide + water
Write down the word equation for anaerobic respiration in a yeast cell.
glucose ==> carbon dioxide + ethanol
Why is fermentation of economic importance?
Used in the manufacture of bread and alcoholic drinks.
Describe three ways in which the body responds to vigorous exercise in order
to ensure sufficient oxygen reaches the muscle cells.
Increase in heart rate; increase in breathing rate and increase in
breath volume.
If exercise carries on for a long time, what happens to the muscles?
Muscles become fatigued and stop contracting efficiently.
Why is respiration described as an exothermic reaction?
Respiration is an exothermic reaction because it transfers energy to
the environment.
Name three large molecules
Carbohydrates
Lipids
Protein
What are Carrbohydrates made from?
Many glucose
molecules
