BIO 225 – Ch. 6 Microbial Nutrition and Growth – Flashcards

Microorganisms require larger quantities of this nutrient for use in cell structure and metabolism

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure

What compound has the highest concentration in a cell?

Most of the dry weight of a microbial cell is from

Which of the following is not a major element of a microbial cell? -copper -carbon -hydrogen -nitrogen -oxygen

An important mineral ion the cytochrome pigments of cellular respiration is

An important mineral ion that is a component of chloroplasts and stabilizer of membranes and ribosomes is

The term autotroph refers to an organism that

The term photoheterotroph refers to an organism that

Calcium is required for bacteria because it

An organism that uses CO2 for its carbon needs would be called

An organism that gets energy from sunlights is

What are the major elements of a microbial cell?

The term photoautotroph refers to an organism that

The term chemoheterotroph refers to an organism that

What organism gets energy from sunlight and uses co2 as its carbon source?

Organisms that feed on dead organisms for nutrients are called

Archae, as a group, are not pathogens. This is because

Aerobic respiration is an example of

Organisms called ___ live on or in the body of a host and cause some degree of harm

The term obligate refers to

The term facultative refers to

The movement of molecules from an area of high concentration to an area of lower concentration is called

Diffusion of water through a semipermeable membrane is called

The movement of substances from lower to higher concentration across a semipermeable membrane that must have a specific protein carrier and cell expenditure of energy is called

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but not energy expenditure is called

The use of energy by a cell to enclose a substance in its membrane by forming a vacuole and engulfing it is called

Bacteria living in a freshwater stream that are moved to salty seawater would

Which of the following require the cell to use ATP? -facilitated diffusion -diffusion -endocytosis -osmosis -none if correct

Nutrient absorption is mediated by the

Facilitated diffusion is limited by

when whole cells or large molecules in a solution are engulfed by a cell, this endocytosis is specifically termed

In ___ conditions, the cell wall will help prevent the cell from bursting

Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37c incubator, and on the shelf of a 50c incubator. After incubation, there was no growth at 37c and 50c, very slight growth out on the bench top, and abundant growth at refrigeration. What term could be used for this species?

Cultures of bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation, there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a(n)

An organism that grows slowly in the cold but has optimum growth temperature of 25c is called a

An organism with a temperature growth range of 45c to 60c would be called a(n)

Human pathogens fall into the group

All of the following could find a location in or on body tissues suitable for growth except: -psychrophiles -anaerobes -facultative anaerobes -mesophiles -capnophiles

A microorganism that does not have catalase or superoxide dismutase would find it difficult to live in an environment with

A microaerophile

The toxic superoxide ion is converted to harmless oxygen by two enzymes

An organism that can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products is a(n)

An organism that can exist in both oxygen and oxygenless environments is a(n)

An organism that cannot tolerate an oxygen environment is a(n)

An organism that cannot grow without oxygen is a(n)

What type of media is used to demonstrate oxygen requirements of microbes?

A halophile would grow best in

A barophile would grow best in

The E. coli that normally live in the human large intestines and produce vitamin K for the body to use would best be termed a ____ relationship

The production of antibodies is a form of antagonism called

When microbes live independently but cooperate and share nutrients, it is called

When microbes are in a close nutritional relationship, and one benefits and the other is not harmed it is:

The time interval from parent cell to two new daughter cells is called the

The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is

The phase of the bacterial growth curve in which newly inoculated cells are adjusting to their new environment, metabolizing but not growing, is the

The phase of bacterial growth curve that shows the maximum rate of cell division is the

In the viable plate count method, a measured sample of a culture is evenly spread across an agar surface and incubated. Each ___ represents one ___ from the sample

When it is important to count the number of cells, determine cell size and differentiate between dead and live cells, a ___ is used.