BIO 111 EXAM 3- FLETCHER
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Importance of photosynthesis to living organisms - ANS plants use photosynthesis to produce
food, and those plants feed the biosphere
Chloroplast - ANS organelle found in cells of plants and some other organisms that captures
the energy from sunlight and converts it into chemical energy
Main structures involved photosynthesis - ANS Chloroplast- double membrane
- stroma: liquid
Grana- stacks of thylakoids/ all light reactions going to occur
Luma- inside of the thylakoids
Substrates and products of photosynthesis - ANS Substrates: H2O, CO2, Sunlight
Products: ATP and NADPH
Explain how plants absorb energy from sunlight - ANS - Chlorophyll A and B: captures light for
photosynthesis
- light goes from ground state to excited state
-
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, short wavelength - ANS high frequency (bluish colors, high-pitched sounds)
long wavelength - ANS low frequency (reddish colors, low-pitched sounds)
How/Where does photosynthesis take place? - ANS - Photosynthesis takes place in the
chloroplasts by absorbing water, light, and CO2 gas
thylakoid membrane - ANS The photosynthetic membrane within a chloroplast that contains
light gathering pigment molecules and electron transport chains.
Photosystem II - ANS - One of two light-capturing units in a chloroplast's thylakoid membrane
or in the membrane of some prokaryotes
- comes before PS 1
- The electrons are returned to Chlorophyl A by splitting water, resulting in oxygen as a water
product
Photosystem 1 (PS1) - ANS - A light capturing enzyme in the thylakoid membrane of a
chloroplast; reduces NADP+ to NADPH.
-
Electron Transport Chain (ETC) - ANS uses the high-energy electrons from the Krebs cycle to
convert ADP into ATP
Inputs of Calvin Cycle - ANS CO2, ATP, NADPH
Outputs of Calvin Cycle - ANS ADP, NADP+, G3P
Calvin Cycle - ANS 3 phases: - Carbon fixation
- Reduction
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Importance of photosynthesis to living organisms - ANS plants use photosynthesis to produce
food, and those plants feed the biosphere
Chloroplast - ANS organelle found in cells of plants and some other organisms that captures
the energy from sunlight and converts it into chemical energy
Main structures involved photosynthesis - ANS Chloroplast- double membrane
- stroma: liquid
Grana- stacks of thylakoids/ all light reactions going to occur
Luma- inside of the thylakoids
Substrates and products of photosynthesis - ANS Substrates: H2O, CO2, Sunlight
Products: ATP and NADPH
Explain how plants absorb energy from sunlight - ANS - Chlorophyll A and B: captures light for
photosynthesis
- light goes from ground state to excited state
-
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, short wavelength - ANS high frequency (bluish colors, high-pitched sounds)
long wavelength - ANS low frequency (reddish colors, low-pitched sounds)
How/Where does photosynthesis take place? - ANS - Photosynthesis takes place in the
chloroplasts by absorbing water, light, and CO2 gas
thylakoid membrane - ANS The photosynthetic membrane within a chloroplast that contains
light gathering pigment molecules and electron transport chains.
Photosystem II - ANS - One of two light-capturing units in a chloroplast's thylakoid membrane
or in the membrane of some prokaryotes
- comes before PS 1
- The electrons are returned to Chlorophyl A by splitting water, resulting in oxygen as a water
product
Photosystem 1 (PS1) - ANS - A light capturing enzyme in the thylakoid membrane of a
chloroplast; reduces NADP+ to NADPH.
-
Electron Transport Chain (ETC) - ANS uses the high-energy electrons from the Krebs cycle to
convert ADP into ATP
Inputs of Calvin Cycle - ANS CO2, ATP, NADPH
Outputs of Calvin Cycle - ANS ADP, NADP+, G3P
Calvin Cycle - ANS 3 phases: - Carbon fixation
- Reduction
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
