Biology Photosynthesis and Cellular Respiration Exam Questions with Correct Answers 100%
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What is the purpose of light in photosynthesis? the light strikes the pigment molecules and
chlorophyll; the absorbed light energy excites the electrons and allows the electrons to be
passed along the chain further making the nadph and atp; it also splits water molecules
What three things are produced during the light dependent (light) reactions? Oxygen,
NADPH, and ATP
What is the role of water during the light reactions? Gives hydrogen and electrons for
photosystem II
What is produced during the light dependent Calvin cycle reactions? sugar
Explain how the energy molecules (ATP and NADPH) are recycled? It goes from light
reactions to calvin cycle and back again after its energy is used
In what organelle does cellular respiration take place? mitochondria
What is the purpose of cellular respiration? provides energy in the form of ATP by
converting oxygen and glucose into water, carbon dioxide and ATP (energy).
Summarize the purpose of the 3 stages of CR glycolysis, krebs cycle, and electron transport
occur to be most effective for humans through all types of work to create enough ATP
Describe how the energy made during the Krebs cycle is used during electron transport chain
8 NADH and 2 FADH2 facilitates transfer of electrons
, How is the oxygen use during electron transport chain oxygen is the "final electron
acceptor." As electrons (usually represented as Hydrogen atoms) are passed down the chain,
they lose their energy in the making of ATP. They have such little energy left, they are of no
further use, and are donated to an oxygen atom to create a molecule of water.
What two substances go into the mitochondria for cellular respiration to occur and what 3
substances come out? glucose and oxygen go in
water, 34 ATP, and CO2 comes out
Under what conditions (aerobic or anaerobic) does cellular respiration occur? Aerobic
because it requires oxygen to occur
Photosynthesis and cellular respiration work in a cycle. Draw the cycle and label the
mitochondria and the chloroplast.
Where is the energy stored in an ATP molecule? terminal bond between second and third
phosphate
Cellular respiration Chemical process where mitochondria break down food molecules to
produce ATP, the three stages are glycolysis, the citric acid cycle, and the electron transport
chain.
Glycolysis occurs in the cytoplasm; net gain of 2 ATP and 2 pyruvate acids (2 NADH energy
carriers to be used in ETC)
Krebs cycle (citric acid cycle) occurs in mitochondria; net gain of 1 ATP and waste product of
CO2 (8 NADH and 2 FADH2 to be used in ETC)
Light Reactions energy from sunlight is absorbed by chlorophyll converted into stored
chemical energy;
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What is the purpose of light in photosynthesis? the light strikes the pigment molecules and
chlorophyll; the absorbed light energy excites the electrons and allows the electrons to be
passed along the chain further making the nadph and atp; it also splits water molecules
What three things are produced during the light dependent (light) reactions? Oxygen,
NADPH, and ATP
What is the role of water during the light reactions? Gives hydrogen and electrons for
photosystem II
What is produced during the light dependent Calvin cycle reactions? sugar
Explain how the energy molecules (ATP and NADPH) are recycled? It goes from light
reactions to calvin cycle and back again after its energy is used
In what organelle does cellular respiration take place? mitochondria
What is the purpose of cellular respiration? provides energy in the form of ATP by
converting oxygen and glucose into water, carbon dioxide and ATP (energy).
Summarize the purpose of the 3 stages of CR glycolysis, krebs cycle, and electron transport
occur to be most effective for humans through all types of work to create enough ATP
Describe how the energy made during the Krebs cycle is used during electron transport chain
8 NADH and 2 FADH2 facilitates transfer of electrons
, How is the oxygen use during electron transport chain oxygen is the "final electron
acceptor." As electrons (usually represented as Hydrogen atoms) are passed down the chain,
they lose their energy in the making of ATP. They have such little energy left, they are of no
further use, and are donated to an oxygen atom to create a molecule of water.
What two substances go into the mitochondria for cellular respiration to occur and what 3
substances come out? glucose and oxygen go in
water, 34 ATP, and CO2 comes out
Under what conditions (aerobic or anaerobic) does cellular respiration occur? Aerobic
because it requires oxygen to occur
Photosynthesis and cellular respiration work in a cycle. Draw the cycle and label the
mitochondria and the chloroplast.
Where is the energy stored in an ATP molecule? terminal bond between second and third
phosphate
Cellular respiration Chemical process where mitochondria break down food molecules to
produce ATP, the three stages are glycolysis, the citric acid cycle, and the electron transport
chain.
Glycolysis occurs in the cytoplasm; net gain of 2 ATP and 2 pyruvate acids (2 NADH energy
carriers to be used in ETC)
Krebs cycle (citric acid cycle) occurs in mitochondria; net gain of 1 ATP and waste product of
CO2 (8 NADH and 2 FADH2 to be used in ETC)
Light Reactions energy from sunlight is absorbed by chlorophyll converted into stored
chemical energy;
