Exam 7: Microbial Nutrition, Ecology, and Growth

Cyanobacteria live in aquatic environments and are photosynthetic.The aquatic environment is their __________ and their role as a primary producer is their ____________.

Saprobes do not need a carbon source for growth and metabolism.

Nutrient absorption is mediated by the

Facilitated diffusion is limited by

Bacterial endosymbionts have lost much of their genome and are dependent upon their aphid hosts for survival.Similarly, the aphids depend on the endosymbiotic bacteria for the supply of amino acids that they provide.This interdependence is the result of

In a commensal relationship, the commensal benefits but the cohabitant is neither harmed nor benefited.

Most microorganisms on Earth can only live and survive in habitats that are similar to human body conditions.

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

The phase of the bacterial growth curve during which microbial growth slows and the rate of multiplication equals the rate of cell death is the

A saprobe with a cell wall will utilize extracellular digestion.

Phosphorus is one of the major elements needed in larger quantities by microorganisms.

In _____ conditions, the cell wall will help prevent the cell from bursting.

Which location would best support the growth of a halophile?

Which location would best support the growth of a barophile?

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

Contractile vacuoles are

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

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

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

Facilitated diffusion and active transport require a carrier protein to mediate the movement across the plasma membrane.