Question

1. in the process of fermentation, what are some of the end products produced by different microorganisms?

a) oxygen and glucose
b) nitrogen and water
c) alcohol, lactic acid, and carbon dioxide
d) methane and sulfur

1. how do microorganisms like lactobacillus contribute to food production?

a) they are used to make bread rise
b) they are used to produce cheese and yogurt
c) they help produce wine and beer
d) they are used to create artificial sweeteners

Explanation:

Question 3

Fermentation is an anaerobic process. Yeast produces alcohol and \( \text{CO}_2 \) (alcoholic fermentation), and bacteria like Lactobacillus produce lactic acid (lactic acid fermentation). Option a: Oxygen and glucose are reactants or products of photosynthesis, not fermentation. Option b: Nitrogen and water are not typical fermentation products. Option d: Methane is from anaerobic respiration in some microbes, but sulfur is not a common fermentation end - product. So the correct option is c.

Lactobacillus is a lactic - acid - producing bacterium. In the production of cheese and yogurt, lactic acid fermentation by Lactobacillus helps in curdling milk and developing the flavor and texture. Option a: Yeast is used to make bread rise (produces \( \text{CO}_2 \)). Option c: Yeast is used for wine and beer production (alcoholic fermentation). Option d: Lactobacillus is not used to create artificial sweeteners. So the correct option is b.

Answer:

c) Alcohol, lactic acid, and carbon dioxide

Question 4