Microbial Nutrition or Cell Nutrition

Question 1

Macronutrients

Answer 1

elements required in fairly large amounts

Question 2

micronutrients

Answer 2

metals and organic compounds needed in very small amounts

Question 3

What are the main macronutrients

Answer 3

C & N

Question 4

What are the minimum nutritional requirements for bacteria

Answer 4

water, source of carbon, source of nitrogen, and some inorganic salts

Question 5

phototrophs

Answer 5

use light as a primary energy source

Question 6

chemotrophs

Answer 6

depend on oxidation-reduction reactions of inorganic or organic compounds for energy

Question 7

Autotrophs

Answer 7

(self-feeders) use carbon dioxide

AKA lithotrophs- rock eating

Question 8

Heterotrophs

Answer 8

(feeders on others) require an organic carbon source

AKA organotrophs

Question 9

Heterotrophs can be further classified by their source of organic matter

Answer 9

1) Saprophytes- live on dead organic matter

2) parasites- derive nutrients from a living host

Question 10

list the macronutrients

Answer 10

C, N, P, S, K, Mg, Ca, Na, Fe

Question 11

what are the effects of temperature on microbial growth

Answer 11

microbes have minimum, optimum and maximum growth temperatures

Question 12

acidophiles

Answer 12

organisms that grow best at low pH

helicobacter pylori, Thibacillus thiooxidans

Question 13

Alkaliphiles

Answer 13

organisms that grow best at high pH

Vibrio cholera

Question 14

Obligate Aerobes

Answer 14

strict

require O2 in order to grow

Question 15

Obligate Anaerobes

Answer 15

cannot survive in O2

Question 16

Facultative Anaerobes

Answer 16

grow better in O2

Question 17

Aerotolerant organism

Answer 17

dont care about O2

Question 18

Microaerophiles

Answer 18

require low levels of O2

Question 19

Explain Thioglycolate Broth

Answer 19

a growth medium that provides anaerobic and aerobic growth conditions. Used to ID O2 requirements of organism