6: Microbial Nutrition

Question 1

heterotroph

Answer 1

organism that must obtain its carbon in an organic form

Question 2

autotroph

Answer 2

an organism that uses inorganic CO2 as its carbon source

convert CO2 into organic compounds
not nutritionally dependent on living things

Question 3

phototroph

Answer 3

microbe that photosynthesizes

Question 4

chemotroph

Answer 4

microbe that gets its energy from chemical compounds

Question 5

photoautotrophs

Answer 5

photosynthetic; produce organic molecules using CO2 that can be used by themselves

Question 6

chemoautotrophs

Answer 6

use organic compounds for energy and inorganic compounds as a carbon source

Question 7

chemolithoautotrophs

Answer 7

rely totally on inorganics minerals

do no require sunlight or organic nutrients

Question 8

chemoheterotrophs

Answer 8

derive carbon and energy from organic compounds and process them through cellular respiration

metabolic conversion of nutrients from other organisms

Question 9

saprobes (chemoheterotroph)

Answer 9

feed on organic waste from dead organisms

free living, decompose, recycle organic nutrients

Question 10

parasites (chemoheterotrophs)

Answer 10

nutrients from living cells and tissues

pathogenic

Question 11

ectoparasite

Answer 11

live on the body

Question 12

endoparasite

Answer 12

live in the body’s tissues/organs

Question 13

intracellular parasite

Answer 13

live within cells

Question 14

obligate parasite

Answer 14

unable to grow outside a living host

Leprosy bacillus, syphilis spirochete