PRELIMINARY CONTEST 2024
Accra Girls SHS: 39 points
Notre Dame Girls SHS: 34 Points
Aburi Girls SHS: 27 points
T.I. AMASS
KUMASI VS AMENFIMAN SHS
TUOBODOM SHTS
ROUND 2
QUESTION
Which metabolic pathway is common for both anaerobic respiration and fermentation?
ANSWER: Glycolysis
EXPLANATION
Glycolysis is the metabolic pathway that breaks down glucose into pyruvate, producing a small amount of ATP. It does not require oxygen, so it occurs in both anaerobic respiration and fermentation. Both processes begin with glycolysis to extract energy when oxygen is absent.
PRACTICE QUESTIONS
1. Where in the cell does glycolysis take place?
ANSWER: Cytoplasm
2. What is the starting substrate of glycolysis?
ANSWER: Glucose
3. What is the end product of glycolysis?
ANSWER: Pyruvate
4. How many ATP are used in the investment phase?
ANSWER: Two
5. How many ATP are made in total in glycolysis?
ANSWER: Four
6. What is the net ATP gain from glycolysis?
ANSWER: Two
7. How many NADH are produced per glucose in glycolysis?
ANSWER: Two
8. Does glycolysis need oxygen?
ANSWER: No
9. Name the enzyme that converts fructose-6-phosphate to fructose-1,6-bisphosphate.
ANSWER: Phosphofructokinase
10. What happens to pyruvate in yeast without oxygen?
ANSWER: It is converted to ethanol and carbon dioxide
11. What happens to pyruvate in muscle without oxygen?
ANSWER: It is converted to lactate
12. Why is glycolysis common to aerobic respiration, anaerobic respiration and fermentation?
ANSWER: It is the first stage in all of them and needs no oxygen