chapter 7 first 20

The phase of the bacterial growth curve in which the rate of multiplication equals the rate of cell death is the Selected Answer: stationary phase. .

Barophiles are microorganisms able to tolerate Selected Answer: high atmospheric pressure. .

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called Selected Answer: facilitated diffusion.

The stage in a normal growth curve when cells reach the maximum rate of cell division is the Selected Answer: log phase.

Facultative anaerobes usually possess Selected Answer: both catalase and superoxide dismutation

The term phototroph refers to an organism that Selected Answer: gets energy from sunlight. .

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 Selected Answer: synergism.

The time interval from parent cell to two new daughter cells is called the Selected Answer: generation time.

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

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

Which of the following require the cell to use ATP? Selected Answer: endocytosis

Diffusion of water through a semipermeable membrane is called Selected Answer: osmosis.

Bacteria living in a freshwater stream that are moved to salty seawater would Selected Answer: shrivel.

Microorganisms require large quantities of this nutrient for use in cell structure and metabolism: Selected Answer: macronutrient

The decline in growth rate during the death phase is due to all of the following except Selected Answer: the decrease in temperature of the culture.

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure: Selected Answer: trace element

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 Selected Answer: facultative anaerobe.

The majority of organisms live or grow in habitats between Selected Answer: pH 6 and 8.

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. Answers: colony, cell

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