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PAPER ONE
BIOENERGETICS
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Cards (26)
Where does photosynthesis occur in plant cells?
In
chlorophyll
and
chloroplasts
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What is the role of light in photosynthesis?
It provides
energy
for the reaction
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What type of reaction is photosynthesis?
It is an
endothermic
reaction
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What is glucose used for in plants?
For
respiration
,
starch
, or
fat storage
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What is cellulose used for in plants?
To produce
cell walls
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How does temperature affect the rate of photosynthesis?
Higher temperatures increase the rate until
denaturing
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What can limit the rate of photosynthesis?
Light intensity or
CO2
concentration
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What happens if there is plenty of CO2 and warmth but not enough light?
The rate of
photosynthesis
will be limited
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What does a plateau in a photosynthesis graph indicate?
The
limiting factor
has changed
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How can we measure the rate of photosynthesis practically?
By measuring
oxygen
produced from pondweed
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What is the independent variable in the photosynthesis experiment?
Light intensity
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How does light intensity change with distance?
It follows an
inverse square
relationship
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Where does respiration take place in cells?
In
mitochondria
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What is aerobic respiration?
Respiration that occurs with
oxygen
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What is the equation for aerobic respiration?
It is the opposite of
photosynthesis
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What happens to breathing and heart rate during exercise?
They increase to deliver more
oxygen
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What is anaerobic respiration?
Respiration that occurs without
oxygen
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What is produced during anaerobic respiration in muscles?
Lactic acid
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What is oxygen debt?
More oxygen needed to break down
lactic acid
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How do plant and yeast cells respire anaerobically?
They produce
ethanol
and carbon dioxide
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What is fermentation?
It is
anaerobic
respiration
in
yeast
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What is metabolism?
The sum of all reactions in a
cell
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What can glucose be converted into?
Starch,
glycogen
,
cellulose
, and
amino acids
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What are amino acids used for in plants?
For
protein synthesis
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What are fatty acids and glycerol used for?
To build up
lipids
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What happens to excess proteins in the body?
They are converted into
urea
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