bacteria reproduction

binary fission

Bacteria reproduce through a process called binary fission. During binary fission, the chromosome copies itself, forming two genetically identical copies. Then, the cell enlarges and divides into two new daughter cells. The two daughter cells are identical to the parent cell. Binary fission can happen very rapidly. Some species of bacteria can double their population in less than ten minutes! This process makes it possible for a tremendous bacterial colony to start from a single cell.

bacteria reproduction

Bacteria, being single-celled prokaryotic organisms, do not have a male or female version. Bacteria reproduce asexually. In asexual reproduction, the "parent" produces a genetically identical copy of itself.

exchanging dna

Are there male and female bacteria? Of course the answer is no. So, sexual reproduction does not occur in bacteria. But not all new bacteria are clones. This is because bacteria can acquire new DNA. This process occurs in three different ways: 1. Conjugation: In conjugation, DNA passes through an extension on the surface of one bacterium and travels to another bacterium ( Figure 1.1). Bacteria essential exchange DNA via conjugation. 2. Transformation: In transformation, bacteria pick up pieces of DNA from their environment. 3. Transduction: In transduction, viruses that infect bacteria carry DNA from one bacterium to another.


instructional diagrams

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male and female bacteria split and join together during reproduction.

a. true

-->  b. false

bacteria can exchange dna.

-->  a. true

b. false

what is the process in which dna is transferred from one bacterium to another?

-->  a) conjugation

b) transformation

c) transduction

d) dna transfer

what is the process in which a virus carries dna from one bacteria to another?

a) conjugation

b) transformation

-->  c) transduction

d) recombination

in asexual reproduction, how does the new cell compare to the parental cell?

a) they are the same size

-->  b) they are genetically identical

c) they have the same organelles

d) all of the above

if binary fission takes 20 minutes, starting with 10 bacteria, how many are there after 3 hours?

a) 80

b) 640

-->  c) 5,120

d) 10,240

sexual reproduction in bacteria occurs through what mechanism?

a) conjugation

b) transformation

c) transduction

-->  d) sexual reproduction does not occur in bacteria.

diagram questions

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