Bacteria: 1

Question 1

What is binary fission?

Answer 1

Binary fission is the process by which prokaryotic organisms, like bacteria, divide and reproduce.

Question 2

What are the 2 idential cells formed called?
What do they have in common?

Answer 2

• The two idential cells are called daughter cells.
• They have the same gentic info.

Question 3

How are the DNA loops and plasmids split between the daughter cells?

Answer 3

• Each bacterial cell gets a single DNA loop (this is one chromosome each!!)
• Each daughter gets variable numbers of plasmids.

Question 4

What type of reproduction is binary fission?

Answer 4

Binary fission is a type of asexual reproduction.

Question 5

Why does the bacterial cell get bigger before it splits?

Answer 5

• The bacterial cell gets bigger before it splits as it will turn into 2 (require more space.)

Question 6

What are the 3 conditions needed for bacteria to reproduce quickly?

Answer 6

• Moist
• Warm
• Lots of nutrients

Question 7

What happens to the bacteria’s reproduction if the conditions are unfavourable?

Answer 7

• If the conditions are unfavourable, the cells will stop dividing and eventually die.

Question 8

What is meant by mean division time?

Answer 8

• Mean division time is the average amount of time it takes a bacterial cell to split into two.

Question 9

What is a bacterial colony?

Answer 9

• A bacterial colony is a group of bacteria derived from the same mother cell.

Question 10

What is the rate of bacterial growth known as?

Answer 10

• The rate of bacterial growth is known as exponential growth.

Question 11

How often do most bacterial cells divide?

Answer 11

• Every 20 minutes
• If there are enough nutrients and suitable temp.

Question 12

Why does number of bacteria level out when there is a shortage of nutrients?

Answer 12

• Some cells die.
• The death rate = rate of cell divison.
• So number of bateria remain the same.