Key Area 2.6 - Environmental Control Of Metabolism In Microorganisms

Question 1

Beef extract

Answer 1

Complex growth medium for micro organisms

Question 2

Death phase

Answer 2

Phase of microorganism growth in which death rate of cells exceeds rate of cell division

Question 3

Exponential growth

Answer 3

Growth phase of micro organisms involving a rapid geometric increase in numbers

Question 4

Generation time

Answer 4

Time taken for a microorganism cell the divide

Question 5

Growth medium

Answer 5

Substance in which micro organisms are encouraged to grow

Question 6

Inducer

Answer 6

Substance that causes a gene to be expressed often leading to production of an enzyme

Question 7

Lag phase

Answer 7

Earliest growth stage in microorganisms

Question 8

Log phase

Answer 8

Exponential phase of microorganism growth

Question 9

Precursor

Answer 9

Substance needed to start a metabolic pathway

Question 10

Secondary metabolite

Answer 10

Substance produced during the stationary phase of a growth of a culture of microorganisms

Question 11

Stationary phase

Answer 11

Phase of microorganism growth during which secondary substances can be made

Question 12

Sterile

Answer 12

Not containing contaminating microorganisms

Question 13

Total cell count

Answer 13

Total number of cells in a culture including viable (live) cells and dead cells

Question 14

Viable cell count

Answer 14

Number of live cells from a total cell count