Lecture 8

Question 1

What are first generation biofuels produced from

Answer 1

Food crops

Question 2

Common sources for first gen biofuels

Answer 2

Sugarcane for ethanol
Corn for ethanol
Oilseeds for biodiesel

Question 3

How is glucose broken down for ethanol fermentation

Answer 3

Glycolysis

Question 4

Product of glycolysis

Answer 4

Two molecules of pyruvate, two ATP, and two NADH

Question 5

How many enzymes are required for glycolysis

Answer 5

10

Question 6

What are NADH and pyruvate used for in aerobic cells

Answer 6

Mitochondria use them to produce more ATP

Question 7

NADH+ is converted to __ to be recycled back to glycolysis

Answer 7

NAD+

Question 8

What is pyruvate converted to in the absence of oxygen

Answer 8

Lactate to maintain a supply of NAD+ for glycolysis

Question 9

What is pyruvate converted to in yeast

Answer 9

Acetaldehyde and then ethanol to maintain the NAD+ supply

Question 10

Equation for ethanol from yeast

Answer 10

Glucose = 2 x ethanol + 2 x carbon dioxide

Question 11

Countries with the most ethanol production

Answer 11

United States and Brazil

Question 12

What is ethanol produced from in Brazil

Answer 12

Sugarcane

Question 13

World’s top ethanol fuel producer

Answer 13

US