Exam 30: Microbial Interactions

The loss of genetic information no longer needed for an intracellular existence by an obligate parasite is called genomic _____________ .

Methanogens are always engaged in relationships with other microbes because methane production requires

The lower genitourinary tract is usually free of microorganisms.

In commensalism

Escherichia coli is the most prevalent bacterium found in the colon.

The skin surface (epidermis) is a very favorable environment for colonization by microorganisms.

A bacterial genus that is found in large numbers in the intestinal tract of breast-fed infants is

Gnotobiotic animals can, but do not have to be, germ-free.

When two different microbes are engaged in a cooperative relationship, they do as well when living separately as they do when living together.

The term that refers to those microbes found as symbionts in a short relationship of a nongrowing nature is __________.

Mussels and sponges sometimes contain methanotrophs as intracellular symbionts because the methanotrophs

In the rumen, food is quickly attacked by cellulase

Microorganisms commonly associated with the human body are traditionally referred to as the

Under normal circumstances, the microbiota of the skin is kept in check by

A relationship in which one organism is found on the surface of another is referred to as a(n) ___________.

Human sweat has antimicrobial activity due to

Which of the following areas of the human body is(are) not normally free of microorganisms?

An example of microbial ___________ is the ability of Vampirococcus to attach to the outer membrane of its prey and then secrete degradative enzymes that result in the release of the prey's cytoplasmic contents.

Buchnera aphidicola provides ___________ to its aphid host that are essential to the survival of the insect.

__________ enzymes catalyze the hydrolysis of beta (1-4) linkages between successive D-glucose residues of cellulose.