BSC 203 Exam 3 2025/2026 Exam
Questions and Correct Answers | New
Update
What does energy from sunlight or oxidation from foodstuffs generate? - 🧠
ANSWER ✔✔- Energy molecules (ATP, NADH, FADH2)
- An electrochemical proton gradient to drive active transport, ATP
Synthesis and other energy processes
T/F: Both pyruvate and acetyl CoA can both be used to make glucose. - 🧠
ANSWER ✔✔True
T/F: CO2 we breathe out comes from the Citric Acid Cycle? - 🧠 ANSWER
✔✔True
Oxidation - 🧠 ANSWER ✔✔The LOSS of electrons by a molecule.
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + Energy
Reduction - 🧠 ANSWER ✔✔The GAIN of electrons by a molecule.
6CO2 + 6H2O + Photons (light) ---> C6H12O6 +6O2
1
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,Cellular Respiration - 🧠 ANSWER ✔✔The process by which anorganism
converts energy from sugars into cellularenergy, consuming oxygen in the
process.
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + Energy (30 ATP)
What is the equivalent number of ATP molecules derived from thecomplete
aerobic oxidation of 1 molecule of glucose? - 🧠 ANSWER ✔✔30 ATP
What type of reactions allow released energy to be stored? - 🧠 ANSWER
✔✔Stepwise reactions.
Cells harvest energy from food in a controlled manner,thereby converting it
mostly to stored energy.
What are the 3 stages of catabolism of foodstuffs? - 🧠 ANSWER ✔✔1.
Digestion
2. Glycolysis (does NOT require oxygen)
3. Citric Acid Cycle and Electron Transport Chain (Requires energy)
Digestion - 🧠 ANSWER ✔✔- breakdown macromolecules by low pH and
enzymes
- occurs in digestive tract and within cells in lysosme
2
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,- does NOT generate energy
Glycolysis - 🧠 ANSWER ✔✔- breakdown of glucose molecules to pyruvate
- occurs in cytosol
- 10 enzymes
- does NOT require oxygen
- generates limited ATP & NADH
Citric Acid Cycle & Electron Transport Chain - 🧠 ANSWER ✔✔- Complete
breakdown of Acetyl CoA to CO2
- Occurs in mitochondria
- Involves both the Citric Acid Cycle and Oxidative Phosphorylation.
- The Citric acid cycle generates NADH, FADH2 (reducing power) and GTP
by oxidizing Acetyl groups to CO2.
- Oxidative phosphorylation (ETC) generates a proton gradient - generates
large amounts of ATP.
Role of mouth in digestion? - 🧠 ANSWER ✔✔Amylase secreted by cells in
salivary glands, hydrolyze starch
3
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Role of stomach in digestion? - 🧠 ANSWER ✔✔Proteases (pepsin-most
active at low H+) H+ & CL- are secreted by cells lining the stomach.
Proteases hydrolyze polypeptides.
Role of liver and pancreas in digestion? - 🧠 ANSWER ✔✔Bile produced by
liver emulsify fats and oils.
Pancreas produces lipases to hydrolyze fats and oils.
Role of large intestine in digestion? - 🧠 ANSWER ✔✔sugars, amino acids,
and fatty acids taken up by epithelial cells. transported throughout body
through blood.
structure of polysaccharides - 🧠 ANSWER ✔✔a polymer with lots of sugar
molecules
T/F: Cellulose is a dietary fiber and your body can't break it down. - 🧠
ANSWER ✔✔True
T/F: Amylase can break the alpha 1,4 linkage in glucose molecules, but not
beta 1,4- beta linkages. - 🧠 ANSWER ✔✔True
T/F: Beta 1,4- linkages in polysaccharides are cleaved by cellulase only
produced by microbes. - 🧠 ANSWER ✔✔True
4
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Questions and Correct Answers | New
Update
What does energy from sunlight or oxidation from foodstuffs generate? - 🧠
ANSWER ✔✔- Energy molecules (ATP, NADH, FADH2)
- An electrochemical proton gradient to drive active transport, ATP
Synthesis and other energy processes
T/F: Both pyruvate and acetyl CoA can both be used to make glucose. - 🧠
ANSWER ✔✔True
T/F: CO2 we breathe out comes from the Citric Acid Cycle? - 🧠 ANSWER
✔✔True
Oxidation - 🧠 ANSWER ✔✔The LOSS of electrons by a molecule.
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + Energy
Reduction - 🧠 ANSWER ✔✔The GAIN of electrons by a molecule.
6CO2 + 6H2O + Photons (light) ---> C6H12O6 +6O2
1
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,Cellular Respiration - 🧠 ANSWER ✔✔The process by which anorganism
converts energy from sugars into cellularenergy, consuming oxygen in the
process.
C6H12O6 + 6O2 ---> 6CO2 + 6H2O + Energy (30 ATP)
What is the equivalent number of ATP molecules derived from thecomplete
aerobic oxidation of 1 molecule of glucose? - 🧠 ANSWER ✔✔30 ATP
What type of reactions allow released energy to be stored? - 🧠 ANSWER
✔✔Stepwise reactions.
Cells harvest energy from food in a controlled manner,thereby converting it
mostly to stored energy.
What are the 3 stages of catabolism of foodstuffs? - 🧠 ANSWER ✔✔1.
Digestion
2. Glycolysis (does NOT require oxygen)
3. Citric Acid Cycle and Electron Transport Chain (Requires energy)
Digestion - 🧠 ANSWER ✔✔- breakdown macromolecules by low pH and
enzymes
- occurs in digestive tract and within cells in lysosme
2
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,- does NOT generate energy
Glycolysis - 🧠 ANSWER ✔✔- breakdown of glucose molecules to pyruvate
- occurs in cytosol
- 10 enzymes
- does NOT require oxygen
- generates limited ATP & NADH
Citric Acid Cycle & Electron Transport Chain - 🧠 ANSWER ✔✔- Complete
breakdown of Acetyl CoA to CO2
- Occurs in mitochondria
- Involves both the Citric Acid Cycle and Oxidative Phosphorylation.
- The Citric acid cycle generates NADH, FADH2 (reducing power) and GTP
by oxidizing Acetyl groups to CO2.
- Oxidative phosphorylation (ETC) generates a proton gradient - generates
large amounts of ATP.
Role of mouth in digestion? - 🧠 ANSWER ✔✔Amylase secreted by cells in
salivary glands, hydrolyze starch
3
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Role of stomach in digestion? - 🧠 ANSWER ✔✔Proteases (pepsin-most
active at low H+) H+ & CL- are secreted by cells lining the stomach.
Proteases hydrolyze polypeptides.
Role of liver and pancreas in digestion? - 🧠 ANSWER ✔✔Bile produced by
liver emulsify fats and oils.
Pancreas produces lipases to hydrolyze fats and oils.
Role of large intestine in digestion? - 🧠 ANSWER ✔✔sugars, amino acids,
and fatty acids taken up by epithelial cells. transported throughout body
through blood.
structure of polysaccharides - 🧠 ANSWER ✔✔a polymer with lots of sugar
molecules
T/F: Cellulose is a dietary fiber and your body can't break it down. - 🧠
ANSWER ✔✔True
T/F: Amylase can break the alpha 1,4 linkage in glucose molecules, but not
beta 1,4- beta linkages. - 🧠 ANSWER ✔✔True
T/F: Beta 1,4- linkages in polysaccharides are cleaved by cellulase only
produced by microbes. - 🧠 ANSWER ✔✔True
4
COPYRIGHT@SARAHROSAPERAL 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
