UA BSC 108 CERTIFICATION SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
⩥ How is C4 photosynthesis different from C3 photosynthesis?.
Answer: C3 photosynthesis produces a three-carbon compound via the
Calvin Cycle while C4 photosynthesis makes an intermediate four-
carbon compound that splits into a three-carbon compound for the
Calvin Cycle
⩥ C3 Photosynthesis.
Answer: The most common form of photosynthesis- a one-stage process
in which atmospheric CO2 is used to form 3-phosphoglycerate, a three-
carbon sugar
⩥ C4 photosynthesis.
Answer: The two-stage photosynthetic pathway in which CO2 is first
fixed in mesophyll cells to form 4-carbon acids, and then the 4-carbon
acids are broken down into 3-carbon acids in the bundle sheath cells
⩥ Examples of C4 plants.
Answer: sugarcane and corn
⩥ Why do some plants use C4 photosynthesis?.
,Answer: It is an adaptation for hot and dry weather
⩥ Photosynthesis.
Answer: the process that stores energy in the form of glucose
⩥ Cellular Respiration.
Answer: the process that releases energy from glucose
⩥ An oxidation reaction involves?.
Answer: the loss of electrons
⩥ A reduction reaction involves?.
Answer: the gain of electrons
⩥ Glucose from food is converted to?.
Answer: Co2, releasing energy that is used to produce ATP in the
process of cellular respiration
⩥ Formula for cellular respiration in words.
Answer: glucose + oxygen --> carbon dioxide + water + energy
⩥ Formula for cellular respiration.
, Answer: C6H12O6 + 6O2 --> 6CO2 + 6H2O + 38ATP
⩥ Aerobic respiration.
Answer: Respiration that requires oxygen
⩥ Anaerobic respiration.
Answer: Respiration that does not require oxygen
⩥ Which stage of cellular respiration requires oxygen?.
Answer: The electron transport chain
⩥ Cellular respiration takes place in?.
Answer: the mitochondria of all eukaryotic organisms
⩥ Structure of Mitochondria.
Answer: Outer membrane that covers the organelle and contains it like a
skin, the inner membrane which folds over many times and creates
layered structures called cristae, and the fluid contained inside the
mitochondria called the matrix
⩥ Three stages of Cellular Respiration.
Answer: glycolysis, the citric acid cycle (Krebs cycle), and the electron
transport chain
PRACTICE SOLUTIONS GRADED A+
⩥ How is C4 photosynthesis different from C3 photosynthesis?.
Answer: C3 photosynthesis produces a three-carbon compound via the
Calvin Cycle while C4 photosynthesis makes an intermediate four-
carbon compound that splits into a three-carbon compound for the
Calvin Cycle
⩥ C3 Photosynthesis.
Answer: The most common form of photosynthesis- a one-stage process
in which atmospheric CO2 is used to form 3-phosphoglycerate, a three-
carbon sugar
⩥ C4 photosynthesis.
Answer: The two-stage photosynthetic pathway in which CO2 is first
fixed in mesophyll cells to form 4-carbon acids, and then the 4-carbon
acids are broken down into 3-carbon acids in the bundle sheath cells
⩥ Examples of C4 plants.
Answer: sugarcane and corn
⩥ Why do some plants use C4 photosynthesis?.
,Answer: It is an adaptation for hot and dry weather
⩥ Photosynthesis.
Answer: the process that stores energy in the form of glucose
⩥ Cellular Respiration.
Answer: the process that releases energy from glucose
⩥ An oxidation reaction involves?.
Answer: the loss of electrons
⩥ A reduction reaction involves?.
Answer: the gain of electrons
⩥ Glucose from food is converted to?.
Answer: Co2, releasing energy that is used to produce ATP in the
process of cellular respiration
⩥ Formula for cellular respiration in words.
Answer: glucose + oxygen --> carbon dioxide + water + energy
⩥ Formula for cellular respiration.
, Answer: C6H12O6 + 6O2 --> 6CO2 + 6H2O + 38ATP
⩥ Aerobic respiration.
Answer: Respiration that requires oxygen
⩥ Anaerobic respiration.
Answer: Respiration that does not require oxygen
⩥ Which stage of cellular respiration requires oxygen?.
Answer: The electron transport chain
⩥ Cellular respiration takes place in?.
Answer: the mitochondria of all eukaryotic organisms
⩥ Structure of Mitochondria.
Answer: Outer membrane that covers the organelle and contains it like a
skin, the inner membrane which folds over many times and creates
layered structures called cristae, and the fluid contained inside the
mitochondria called the matrix
⩥ Three stages of Cellular Respiration.
Answer: glycolysis, the citric acid cycle (Krebs cycle), and the electron
transport chain
