Fermentation & Anaerobic Respiration Practice Problems

Which condition would favor the production of lactic acid by bacteria?

Which of the following energy-producing processes yields the lowest number of ATP molecules per glucose molecule in prokaryotes?

Which of the following is used in both aerobic and anerobic respiration?

When oxygen is absent, what metabolic process do bacteria often rely on for energy production from glucose?

Which of the following is the process of converting nitrate to nitrogen gas:

What happens to nitrogenase enzyme in the presence of oxygen?

What is the primary end-product of anaerobic sludge digestion?

Under which conditions does hydrogen sulfide, a reduced compound in the sulfur cycle, generally form?

Methanogenic archaea are responsible for catalyzing CO₂ and H₂ into CH₄ in which type of environment?

Which process involves the conversion of biomass into alternative energy sources using microbes?

Yeast can ferment sugars to produce which of the following biofuels?

During winemaking, the acetobacter bacteria can convert ethanol into acetic acid under which of the following conditions?

In complete anaerobic conditions, a yeast was growing. For this yeast cell, what are the end products of cellular respiration?

Which of the following is the primary purpose of fermentation?

There are two types of cellular respiration, both of which always begin with glycolysis. Which of the following statements about anaerobic respiration is true?

The phenol red fermentation test is usually used to differentiate organisms based on their ability to ferment carbohydrates such as from a glucose broth. If the color turns yellow at the end of the test, what does this result imply?

In an optimal environment, how many ATP molecules can be produced by a yeast cell from the fermentation of one molecule of glucose?

In an experiment designed to study cellular metabolism under different environmental conditions, scientists observed that some cells were able to survive without oxygen by utilizing alternative chemical reactions. What category do these alternative chemicals belong to when they act as terminal electron receptors?

In a chemical reaction, which of the following substances acts as an oxidizing agent by accepting electrons?

In the process of cellular respiration in a muscle cell, what is the fate of carbon atoms in a molecule of glucose?

What happens when bakers yeast acts on sucrose during bread-making?

The process of converting sugars into alcohol and carbon dioxide during the production of bread is usually facilitated by:

In the production of biofuels, which of the following would be an ideal growth medium for yeast fermentation?

Which statement accurately represents industrial fermentation?

Choose the correct option regarding the following statement: The production of yogurt relies on mixed acid fermentation.

What is the main role of bacteria in the fermentation process of sauerkraut?

Methane is a versatile and efficient fuel produced by microbial metabolism. It can be produced by microbes, specifically through the action of methanogens in which of the following environments?

Which of the following is correct regarding the treatment of drinking water and the treatment of sewage?

In the context of industrial fermentation equipment, what are the two types of production methods?

Which of the following is the main objective of treating industrial wastewater?

What term is used to describe the compounds that are produced by microbes and can be utilized for energy purposes?

A ________ is a device that uses biological materials to detect the presence of certain chemicals.

Match the descriptions below with their corresponding terms.

1. Refers to water that is fit to drink

2. Used in the processing of animal wastes; mimics primary and secondary wastewater treatment

3. Undesirable fermentation reactions in food, leading to poor taste, smell, or appearance

4. Brief heating of foods during processing

5. Descriptor of the level of organic material present in wastewater

A. Spoilage

B. Oxidation lagoon

C. Pasteurization

D. Potable

E. BOD

Which of these options correctly identifies a step in the cheese-making process where bacteria that feed on lactose to produce lactic acid are added?

What are the steps involved in the process of brewing beer?