4.10

Question 1

what is binary fission?

Answer 1

Asexual reproduction in bacteria in which the bacteria split in half

Question 2

what is culture?

Answer 2

growing microorganisms in the laboratory, providing then with nutrients, oxygen, Ph and temperature they need to produce large numbers so that they can be observed and measured.

Question 3

What are the ideal conditions for bacteria?

Answer 3

1) Food
2) Oxygen
3) Water
4) Temperature (warm)

Question 4

Factors Affecting Microbial Growth

Answer 4

1) Water – Bacteria need water to dissolve the food they use for energy and growth. Water allows the food to get into the cells, is used for the many chemical reactions necessary for life and growth, and allows waste products to escape.
2) Food/Nutrients – All bacteria require energy to live and grow. Energy sources such as sugars, starch, protein, fats and other compounds.
3) Oxygen- Some bacteria require oxygen to grow.
4) Temperature.
5) pH - Most bacteria grow well at neutral pH.