Question

Microorganisms are beneficial to humans in all of the following ways EXCEPT: Select one: O a. soil microorganisms break down matter. O b. some microorganisms live symbiotically with plants and transform nitrogen gas into organic compounds. O c. Fermenting microorganisms produce yogurt and sauerkraut from milk and cabbage. O d. marine and freshwater organisms form the basis of the food web. O e. Pseudomonas, molds and other microorganisms break down lettuce and strawberries at refrigeration temperatures.

Answer 1

1. Answer : d - Pseudomonas, molds and other microorganisms break down lettuce and strawberries at refrigeration temperature

All the statements except d indicates the beneficial aspects of bacteria such as biodegradation, promoting plant growth, fermentation of food products etc. Statement d is indicative of the harmful effect of bacteria. Pseudomonas being psychrotrophic bacteria and other molds grow on refrigerated food items leading to their spoilage

2.Answer: c. Krebs cycle

Fatty acids undergo beta oxidation which is the catabolic break down of fatty acids into acetyl Co A which enters the citric acid cycle and is oxidized into carbon dioxide