BIOLOGY 1000 EXAM #2 REVIEW: CELLULAR
ENERGETICS, PHOTOSYNTHESIS, RESPIRATION, AND
CELL STRUCTURE COMPLETE QUESTIONS WITH
ANSWERS
1. Are enzymes permanently altered in chemical reactions?
A) Yes
B) No
C) Only at high temperatures
D) Only in the presence of ATP
Correct Answer: B
Explanation: Enzymes are catalysts; they are not consumed or permanently
changed in the reactions they speed up.
2. ATP is created from an ATC (thylakoid membrane) NADP+ and is reduced to
become what?
A) NADPH
B) ATP
C) ADP
D) Glucose
Correct Answer: A
Explanation: During the light reactions of photosynthesis, NADP+ is reduced to
NADPH.
3. What is the correct balanced equation for C6H12O6?
A) 6CO2 + 6H2O + ATPs
,B) 6CO2 + 6H2O + light energy
C) 6O2 + 6H2O + glucose
D) CO2 + H2O + energy
Correct Answer: A
Explanation: Cellular respiration of glucose produces carbon dioxide, water, and
ATP.
4. In the reaction where catechol is broken into benzoquinone by catechol
oxidase, what is catechol?
A) Enzyme
B) Product
C) Substrate
D) Cofactor
Correct Answer: C
Explanation: Catechol is the molecule that is acted upon (the substrate) by the
enzyme catechol oxidase.
5. Which of the following is a characteristic of Eukaryotes?
A) No nuclei
B) Single-celled only
C) No organelles
D) Many are multicellular
Correct Answer: D
Explanation: Eukaryotes have nuclei and many are multicellular; they also contain
organelles.
6. Which of the following is a characteristic of Prokaryotes?
A) Nuclei present
B) Multicellular
,C) Most use oxygen
D) No organelles
Correct Answer: D
Explanation: Prokaryotes lack nuclei and membrane-bound organelles; they are
typically single-celled.
7. What do chloroplasts contain?
A) Grana only
B) Stroma only
C) Chlorophyll and accessory pigments
D) Nuclei
Correct Answer: C
Explanation: Chloroplasts are organelles that contain chlorophyll and other
pigments for photosynthesis.
8. What is the definition of grana?
A) Fluid within the chloroplast
B) Pores in the leaf
C) Stack of thylakoids
D) A type of pigment
Correct Answer: C
Explanation: Grana are stacks of thylakoid membranes inside chloroplasts.
9. What are pigments?
A) Molecules that absorb all wavelengths of light
B) Molecules that absorb certain wavelengths and reflect/transmit others
C) Enzymes that break down glucose
D) Pores in the leaf
, Correct Answer: B
Explanation: Pigments absorb specific wavelengths of light and reflect or transmit
the rest, giving them their color.
10. What is the function of stomata?
A) Absorb light energy
B) Let CO2 in and O2/H2O out
C) Synthesize ATP
D) Store chlorophyll
Correct Answer: B
Explanation: Stomata are pores in leaves that allow gas exchange—CO2 enters,
O2 and water vapor exit.
11. What is the stroma?
A) The fluid within the chloroplast
B) The stack of thylakoids
C) The outer membrane of the chloroplast
D) The pigment inside chloroplasts
Correct Answer: A
Explanation: Stroma is the fluid-filled space surrounding the thylakoids inside the
chloroplast.
12. What is a thylakoid?
A) A flattened membrane-bound sac in the chloroplast
B) The fluid inside the chloroplast
C) A pore in the leaf
D) A stack of grana
ENERGETICS, PHOTOSYNTHESIS, RESPIRATION, AND
CELL STRUCTURE COMPLETE QUESTIONS WITH
ANSWERS
1. Are enzymes permanently altered in chemical reactions?
A) Yes
B) No
C) Only at high temperatures
D) Only in the presence of ATP
Correct Answer: B
Explanation: Enzymes are catalysts; they are not consumed or permanently
changed in the reactions they speed up.
2. ATP is created from an ATC (thylakoid membrane) NADP+ and is reduced to
become what?
A) NADPH
B) ATP
C) ADP
D) Glucose
Correct Answer: A
Explanation: During the light reactions of photosynthesis, NADP+ is reduced to
NADPH.
3. What is the correct balanced equation for C6H12O6?
A) 6CO2 + 6H2O + ATPs
,B) 6CO2 + 6H2O + light energy
C) 6O2 + 6H2O + glucose
D) CO2 + H2O + energy
Correct Answer: A
Explanation: Cellular respiration of glucose produces carbon dioxide, water, and
ATP.
4. In the reaction where catechol is broken into benzoquinone by catechol
oxidase, what is catechol?
A) Enzyme
B) Product
C) Substrate
D) Cofactor
Correct Answer: C
Explanation: Catechol is the molecule that is acted upon (the substrate) by the
enzyme catechol oxidase.
5. Which of the following is a characteristic of Eukaryotes?
A) No nuclei
B) Single-celled only
C) No organelles
D) Many are multicellular
Correct Answer: D
Explanation: Eukaryotes have nuclei and many are multicellular; they also contain
organelles.
6. Which of the following is a characteristic of Prokaryotes?
A) Nuclei present
B) Multicellular
,C) Most use oxygen
D) No organelles
Correct Answer: D
Explanation: Prokaryotes lack nuclei and membrane-bound organelles; they are
typically single-celled.
7. What do chloroplasts contain?
A) Grana only
B) Stroma only
C) Chlorophyll and accessory pigments
D) Nuclei
Correct Answer: C
Explanation: Chloroplasts are organelles that contain chlorophyll and other
pigments for photosynthesis.
8. What is the definition of grana?
A) Fluid within the chloroplast
B) Pores in the leaf
C) Stack of thylakoids
D) A type of pigment
Correct Answer: C
Explanation: Grana are stacks of thylakoid membranes inside chloroplasts.
9. What are pigments?
A) Molecules that absorb all wavelengths of light
B) Molecules that absorb certain wavelengths and reflect/transmit others
C) Enzymes that break down glucose
D) Pores in the leaf
, Correct Answer: B
Explanation: Pigments absorb specific wavelengths of light and reflect or transmit
the rest, giving them their color.
10. What is the function of stomata?
A) Absorb light energy
B) Let CO2 in and O2/H2O out
C) Synthesize ATP
D) Store chlorophyll
Correct Answer: B
Explanation: Stomata are pores in leaves that allow gas exchange—CO2 enters,
O2 and water vapor exit.
11. What is the stroma?
A) The fluid within the chloroplast
B) The stack of thylakoids
C) The outer membrane of the chloroplast
D) The pigment inside chloroplasts
Correct Answer: A
Explanation: Stroma is the fluid-filled space surrounding the thylakoids inside the
chloroplast.
12. What is a thylakoid?
A) A flattened membrane-bound sac in the chloroplast
B) The fluid inside the chloroplast
C) A pore in the leaf
D) A stack of grana
