Microbiology Chapter 7 practice questions – Flashcards

Microorganisms require large 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:

An organic nutrient that cannot be synthesized by the organism and must be provided is called a/an:

An important mineral ion of 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 phototroph refers to an organism that:

The term autotroph refers to an organism that:

The term heterotroph refers to an organism that:

The term chemotroph refers to an organism that:

The methanogens, producers of methane gas, require environments that:

Organisms that feed on dead organisms for nutrients are called:

The type of photosynthesis that does not produce oxygen:

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

Diffusion of water through a semi-permeable membrane is called:

The movement of substances from lower to higher concentration across a semi-permeable membrane that must have a specific protein carrier and use energy is called:

The movement of substances from higher to lower concentration across a semi-permeable membrane that must have a specific protein carrier but no 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:

When bacteria that are living in a freshwater stream moved to seawater, then what would happen?

Which of the following microorganisms would find hypotonic conditions most detrimental?

Which of the following require the cell to use ATP?

Contractile vacuoles are:

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

Cultures of a 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/an:

A microorganism that has an optimum growth temperature of 37°C but can survive short exposure to high temperatures is called a/an:

An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called a/an:

An organism with a temperature growth range of 45°C to 60°C would be called a/an:

All of the following could find a location in or on body tissues suitable for growth, except:

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

Which of the following choice is true in case of a microaerophile?

A halophile would grow best in:

The E. coli that normally live in the human large intestines and produce vitamin K that the body uses would be best termed a _____ relationship.

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:

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

The majority of organisms live or grow in habitats between:

An organism that grows best at a higher CO2 tension than is normally present in the atmosphere is a(n):

Barophiles are microorganisms able to tolerate:

Plant roots provide various growth factors for soil bacteria, and the bacteria help fertilize the plant by supplying it with minerals. This is an example of:

The stage in a normal growth curve when cells reach the maximum rate of cell division is the:

The decline in growth rate during the death phase is due to all of the following, except:

Which of the following methods of enumerating cells is the only one to detect live cells?

If a culture starts out with 1 cell and after 4 hours there are 64 cells, how many generations have occurred?

You inoculate a culture into a test tube containing broth and take it out of the incubator the next day. You see the culture is growing equally throughout the broth. You conclude the culture must be:

You inoculate a culture into a test tube containing broth and take it out of the incubator the next day. You see the culture is growing at the bottom of the tube. You conclude the culture must be:

Facultative anaerobes usually possess:

An organic nutrient essential to an organism's metabolism that cannot be synthesized itself is termed a/an

The source of the necessary elements of life is

An organism that can synthesize all its required organic components from CO2 using energy from the sun is a

An obligate halophile requires high

Chemoautotrophs can survive on _______ alone.

Which of the following substances are required by all organisms?

A pathogen would most accurately be described as a

Which of the following is true of passive transport?

A cell exposed to a hypertonic environment will ______ by osmosis

Active transport of a substance across a membrane requires

Psychrophiles would be exposed to grow

Which of the following is not involved in quorum sensing?

Superoxide ion is toxic to strict anaerobes because they lack

The time required for a cell to undergo binary fission is called the

In a viable plate count, each _______ represents a _______ from the sample population

The stage in population growth with the highest rate of cell division is the

The stage in a normal growth curve when cells reach the maximum rate of cell division is the: