lecture 29

Question 1

how much of bacteria in the environment are auxotrophs

Answer 1

98%

Question 2

without culturing how can we indentify bacteria

Answer 2

the 16s ribosomal RNA gene,

Question 3

what does proliferate mean

Answer 3

increase rapidly in number

Question 4

populations of microbes interact to form what

Answer 4

communities

Question 5

whats a microbiome

Answer 5

all microorganisms, and their genes, within a
particular environment

Question 6

whats enrichment culture

Answer 6

providing the temperature and
chemical conditions in the laboratory that encourage
the growth of specific groups of microbes.

Question 7

whats a mesocosm

Answer 7

experimental conditions that simulates the real environment

Question 8

why do we indentify bacteria by the 16s ribosomal RNA

Answer 8

the 16s ribosomal RNA is a key component of the ribosome. all organisms have this sequence as they all have ribosomes. this sequence is therefore highly conserved but also variable for different species. thus we use it as a molecular fingerprint.

Question 9

whats bacterias food source

Answer 9

inorganic molecules

Question 10

phototrophs get their energy from what

Answer 10

light

Question 11

how do phototrophs reduce interspecific competition

Answer 11

is to tune their antenna to different wavelengths of light

Question 12

whats catabolism

Answer 12

breaks down the reactants into building blocks and energy

Question 13

whats anabolism

Answer 13

we take these building blocks and enegy to build macromolecules.