Biology Unit 4 Quiz her review Flashcards
Explain the structural difference between ADP and ATP.
ATP has 3 phosphate groups, but ADP has 2.
Write a brief summary for how ATP is made from ADP (you can also write an equation).
ATP + H2O → ADP + P
Water is used to break apart one of the phosphate groups in ATP. This releases energy.
Describe where/how ATP stores energy.
ATP stores the majority of its energy in the bonds between phosphate groups.
State in what colored light the plant would grow best. Explain.
Blue light has the highest
Absorbance, which means it
will absorb the most light that will
be used to power photosynthesis.
Write the equation for photosynthesis.
Sunlight energy + 6 H2O + 6 CO2 → 6 O2 + C6H12O6
State which cell(s) can perform photosynthesis
Plant cells because they have chloroplasts
State where in the cell photosynthesis occurs
In the chloroplast (stroma and thylakoid membrane)
State three products of the light dependent reaction and where they are made…
Explain their importance in photosynthesis.
ATP - made from the help of H+ ions diffusing from inner thylakoid to stroma through ATP Synthase
O2 - made from water splitting in photosystem II
NADPH - made from electrons combining with NADP+ and H+ ions at the end of the electron transport chain.
IMPORTANCE:
ATP - powers the reactions in the Calvin Cycle
O2 - not used in photosynthesis, but helpful in other
processes, including cellular respiration
NADPH - carries the electrons to the Calvin Cycle, which
are used to power the reactions
Hypothesize what you would expect to happen to the process of photosynthesis if Photosystem I was unable to accept photons (light energy).
If Photosystem I does not
accept electrons, NADPH
cannot be made, and
ultimately the Calvin Cycle
wouldn’t occur.
Describe how ATP Synthase generates ATP. (Be sure to mention H+ ions in your answer.)
H+ ions passively diffuse through the thylakoid membrane into the stroma by traveling through ATP synthase, causing ATP synthase to rotate and ultimately create ATP
A nuclear disaster has occurred and now all of the water on earth contains radioactive oxygen-18. That means all of the oxygen molecules are now radioactive isotopes. Choose the most logical result of this disaster.
Explain.
A. All oxygen produced by plants would be radioactive.
B. All glucose produced by plants would be radioactive.
C. All carbon dioxide produced by plants would be radioactive.
D. All ATP produced by plants would be radioactive.
The oxygen produced by photosynthesis is from the oxygen in water.
Glucose is produced from CO2, NOT water.
CO2 is from the atmosphere, NOT water.
ATP is produced from ADP and P, NOT water.
State the substances made in the LDR that are needed in the Calvin Cycle.
ATP, NADPH and electrons
State what from the atmosphere is needed in the Calvin cycle.
CO2
State where the calvin cycle occurs (specifically).
Stroma, inside the chloroplast
A green oak leaf is exposed to sunlight in the summer. Describe the exchange of CO2 and O2 within the cells of the leaf and between the leaf and the atmosphere (in respect to photosynthesis).
The leaf will have exposure to sunlight, which means it will do photosynthesis. This will create O2 and take in CO2. So the leaf will gain CO2 and lose O2. The atmosphere will do the opposite.
