Micro

All of the following are diameters of cells that would be resolved in a microscope with a limit of resolution of 0.2 µm except

0.1 µm.

A nutrient is considered essential if ________.

All of the choices are correct.

Which of the following food marketing efforts can influence an individual's food selections?

All of the choices are correct.

Endospores are

All of these choices are correct.

According to current thought regarding the domains of life, which two domains are believed to be the most closely related?

Archaea and Eukarya

Which of the following nutrients is NOT involved in cellular development?

Carbohydrates

Viruses, Rickettsia, and Chlamydia are described as obligate intracellular parasites because they can only be propagated inside living host cells. Which of the following would be appropriate for their cultivation?

Cell or tissue cultures

Which U.S. government agency regulates nutrition and health-related claims on product labels?

Food and Drug Administration (FDA)

Many of the top ten leading causes of death in the United States are associated with certain dietary practices. What are the top two leading causes of death in the United States?

Heart disease and cancer

Which of the following factors does NOT have an environmental or physiological influence on a typical American college student's food choices?

Is nutrient-dense

A bacterial genus that has waxy mycolic acid in the cell walls is

Mycobacterium.

A student was given a stained smear to observe. Upon observation, the student noted rod-shaped bacteria that were clear and unstained against a darker background. What sort of stain was performed on this slide?

Negative stain

You accidentally switch the Crystal violet and Safranin steps during your Gram stain. When you look under the microscope, what color will a Gram positive bacteria, like Staphylococcus aureus, be?

Purple

Which of the following is an objective of Healthy People 2030?

Reduce the proportion of adults with obesity

Which of the following is essential for development of discrete, isolated colonies?

Solid medium

food: medications

The Dietary Supplement Health and Education Act of 1994 allows manufacturers to classify nutrient supplements and herbal products as _______ rather than _______, reducing the testing they must undergo before marketing.

A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium. Following incubation, only the E. coli grows in the culture. What is the most likely explanation?

The culture medium must be selective.

Which statement is not a characteristic of biofilms?

They involve bacteria only.

Which of the following reasons is NOT an important reason why people should study nutrition?

To provide advice to people concerning which dietary supplements should be consumed and which should be avoided

Orange, red, and yellow fruits and vegetables are rich food sources of _______.

beta-carotene

Which structure protects bacteria from being phagocytized?

capsule

Learning about food and nutrition is a/an _______ factor that affects food choices.

cognitive

Heart disease has both modifiable and nonmodifiable risk factors that contribute to its development. All of the following are lifestyle risk factors for heart disease EXCEPT ________.

family history and genetic predisposition for heart disease

All of the following structures contribute to the ability of pathogenic bacteria to cause disease, except

inclusions

All of the following are correct about a slime layer, except

it enables movement of cells.

What unit of measure is most appropriate for expressing the size of bacteria?

micrometer

All of the following are examples of basic dyes except

nigrosin.

Undernutrition and overnutrition are both problems in the United States. All of the following statements are true EXCEPT ________.

overnutrition is less common than undernutrition in the United States

The Nurses' Health Studies are a set of ongoing investigations that began in 1976..

prospective cohort studies.

If microorganism A releases a growth factor within the biofilm while microorganism B releases antibiotic protection, both bacteria are more than likely participating in

quorum sensing.

Responsible scientists will not accept a novel hypothesis as fact until ________.

repeated testing confirms the findings

All of the following are criteria that are used to classify different types of microbiological growth media except

sensory characteristics (color, smell).

A reducing medium contains

substances that remove oxygen.

Which of the following, pertaining to prokaryotic cell membranes, is mismatched?

unique hydrocarbon present - cyanobacteria

A possible explanation for an observation that guides scientific research is called

hypothesis

Brain-heart infusion, trypticase soy agar (TSA), and nutrient agar are all examples of which type of media?

conplex