Unit 2 Key Area 6

Question 1

Metabolite which acts on an enzyme at an earlier stage in a pathway exerting negative feedback control.

Answer 1

Inhibitor

Question 2

Average time taken for a population of cells to double in number.

Answer 2

Mean generation time

Question 3

Phase of growth during which cells grow and multiply at the maximum rate.

Answer 3

Log/exponential

Question 4

Phase of growth during which the rate of production of new cells equals the death rate of the old ones.

Answer 4

Stationary

Question 5

Phase of growth during which the number of cells dying exceeds the number of new cells being produced.

Answer 5

Death

Question 6

Phase of growth during which cells adjust to the growth medium and show increased metabolic activity but no increase in numbers

Answer 6

Lag

Question 7

Type of graph paper where each set of values on the y-axis is ten times greater than the set in the previous cycle below.

Answer 7

Semi-logarithmic

Question 8

Metabolite made by a microbe but not essential for its growth.

Answer 8

Secondary

Question 9

Metabolite made by a microbe and essential for its growth.

Answer 9

Primary

Question 10

Process that occurs when an organisms rate of synthesis of organic materials exceeds the rate of their breakdown.

Answer 10

Growth

Question 11

Techniques employed to try to maintain sterile conditions and eliminate contaminants while working with micro-organisms.

Answer 11

Aseptic

Question 12

Specialised container used to culture micro-organisms on a larger scale to obtain a useful product.

Answer 12

Fermenter

Question 13

Building up of a complex molecule from simpler ones by a cell.

Answer 13

Biosynthesis

Question 14

Substance such as nutrient agar or broth used to culture micro-organisms.

Answer 14

Growth medium

Question 15

Process by which a micro-organisms metabolism is deliberately altered to make it produce large quantities of a metabolite.

Answer 15

Manipulation