Week 3 P1 Microbial nutrition Y

Question 1

Examples of growth factors

Answer 1

AA, purines and pyrmidines, vitamins

AA 4 PS
PP 4 NS
V 4 Enzyme co-factors

Question 2

Phototrophs

Answer 2

Uses energy as light

Question 3

Chemotrophs

Answer 3

Obtains energy from oxidaition of chemical compounds

Question 4

Lithotrophs

Answer 4

Uses reduced inorganic substances as energy

Question 5

Organotrophs

Answer 5

Uses energy from organic compounds

Question 6

Dif types of nutrient uptake

Answer 6

Passive diffusion
Facilitated
Active transport
Group translocation

Question 7

PD

Answer 7

High conc -> Low conc
e.g H20,c02 etc

Question 8

FD

Answer 8

Uses carrier proteins called permeases embedded on membrane used to increase diffusion

Question 9

AT

Answer 9

Low -> High using energy e.g permeases , ATP

Question 10

GTS

Answer 10

Transports sugar to cells, undergoes chemical changes in the movement

Question 11

If fe3+ is insoluble how does it reach the cells?

Answer 11

Uses molecule called sideophore which is an iron binding compound to supply the cell, sideophore binds to cell receptor and secretes its iron

Question 12

Culture media

Answer 12

Sol/Liq to grow transport and store Micro organisms

Question 13

Name the 2 types of media

Answer 13

Selective and differential