Exam 4 - Quiz Questions Flashcards
Which of these represents MOST of the ocean’s biomass?
microbes
Which of these regulates the formation of biofilms?
quorum sensing
Microbes which display the same physiological responses to environment and others within a community are said to occupy the same:
niche
Today, the most effective technique for analyzing microbial community structure is based on this analysis.
sequencing small subunit rRNA
What is the estimated percentage of microbial species on Earth that have been grown in culture?
1-5%
Which of these represents MOST of the ocean’s organisms?
marine viruses
Which of these characterizes dead zones in the ocean?
being hypoxic
In terrestrial environments, where is the greatest microbial diversity found?
soil
What are humic substances?
organics from soil
What is the deepest that viable microorganisms have been found in the Earth’s crust?
3000 meters
Which of the following is an extrinsic factor that affects the rate of food spoilage?
the storage temperature
LTH pasteurization is a method of preservation that involves heting the liquid to ____ ° for 30 minutes.
63
Fermented soybean products, like miso and tempeh, are produced using
molds
Vinegar production occurs through the oxidation of ethanol by
acetic acid bacteria
Ozonation is a wastewater treatment used to
disinfect wastewater
