A microorganism grows in the lab on medium containing mineral salts but no organic compounds. The organism is likely to be a(n)

A cell that uses an organic carbon source and obtains energy from light would be called a

A(n) ________ organism require(s) oxygen for growth.

An aquatic microbe that can grow only near the surface of the water is probably which of the following?

The carotenoid pigments of some phototrophs interact with ________ to reduce its toxicity.

The absence of ________ leaves obligate anaerobes susceptible to killing by oxygen.

A microbe that grows only at the bottom of a tube of thioglycollate medium is probably a(n)

Nitrogen is a growth-limiting nutrient for many organisms because

An organism that requires chemical nutrients which serve as final electron acceptors is a(n)

At temperatures higher than the maximum growth temperature for an organism

Ted heats some food just to boiling, and stores some of it immediately in a container which he places in the refrigerator. A week later he takes the food out and finds it has spoiled. The microbes responsible are probably

In the process of ________, microbes detect the presence and density of other microbes and modify their metabolic activity in response.

Which of the following organisms would be most likely to contaminate a jar of pickles?

Organisms that can grow with or without oxygen present are

A fastidious organism might be grown on which of the following types of media?

Obligate anaerobes may be cultured in the laboratory

Joan wants to discover a microbe capable of degrading an environmental contaminant. Which of the following culturing methods would be most effective for isolation of such an organism?

A microbiologist inoculates a flask of broth to a concentration of 100 bacterial cells per ml. The generation time of the species is 1 hour, and there is no lag phase. How long will it be before the culture contains more than 6,000 cells per ml?

An epidemiologist is investigating a new disease and observes what appear to be bacteria inside tissue cells in clinical samples from victims. The scientist wants to try to isolate the bacteria in the lab. What culture conditions are most likely to be successful?

The events of binary fission are I. the cell doubles in size II. the DNA is replicated III. the cell forms a septum IV. the cell separates from its offspring The CORRECT order of these events is?

MacConkey agar plates represent ________ medium.

Which of the following methods provides information about the number of living cells in a sample of bacterial culture?

The growth of bacterial cultures is best described as

A ________ is used in industrial microbiology to produce microbial products that are only synthesized during log phase growth.

The ________ of a population is the time it takes for the cells to double in number.

Which of the following is an indirect method for estimating the number of microbes in a sample?

During which growth phase are bacteria more susceptible to antimicrobial drugs?

The use of salt and sugar in preserving various types of foods is an application of which of the following concepts?

A clinical sample labeled as "sputum" was collected from

Pure cultures are often obtained by isolating

________ are complex communities of various types of microbes that adhere to surfaces.

The ________ method provides an estimate of the CFUs (colony-forming units) in a sample.

Blood agar plates are an example of ________ medium.

Reducing medium is used to isolate ________ microbes.

The Most Probable Number (MPN) method is used

The generation time of bacterial cells is shortest during the ________ phase.

When cells are metabolically active but not dividing, they are in the ________ phase.

Rates of cell production and cell death are approximately equal during the ________ phase of growth.

Creating conditions in the laboratory that promote the growth of some microbes while inhibiting the growth of others is called

A laboratory recipe lists sucrose, an ammonia compound, calcium salts and a buffer as the ingredients for a microbiologic medium. These are added to water and autoclaved. What type of medium does this protocol produce?

A capnophile is a microorganism that thrives in conditions of high

A microorganism found living under conditions of high ________ is a barophile.

Microaerophiles are microbes that grow best at low

A 0.1 ml sample of a log phase culture contains 10,000 bacterial cells/ml. It is added to 9.9 ml of fresh culture medium broth. Assume a generation time of 30 minutes, and no limiting nutrients. How many bacteria will be present in the entire broth culture after five hours?