Chapter 9.1.1 (Exam 2) Metabolic Pathways

Question 1

How do cells get energy from glucose?

Answer 1

A series of metabolic pathways

Question 2

What are the 3 principles of metabolic pathways?

Answer 2

Complex transformations occur in a series of separate reactions each catalyzed by specific enzymes that can be inhibited or activated to alter the rate of the pathway

Many metabolic pathways are similar in all organisms

In eukaryotes, metabolic pathways are compartmentalized in specific organelles

Question 3

What’s the chemical equation for cellular respiration (metabolism of glucose)?

Answer 3

C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + free energy

Question 4

Is cellular respiration (metabolism of glucose) endergonic or exergonic?

Answer 4

Highly exergonic; drives endergonic formation of many ATP molecules

Question 5

What does a negative value for ΔG mean? Endergonic or Exergonic?

Answer 5

Exergonic

Question 6

What does a positive value for ΔG mean? Endergonic or Exergonic?

Answer 6

Endergonic

Question 7

What are the three catabolic processes that harvest energy from glucose?

Answer 7

Glycolysis (anaerobic)

Cellular respiration (aerobic)

Fermentation (anaerobic)