The Prokaryotes I

Question 1

What type of replication do bacteria have?

Answer 1

Bidirectional

Leading strand replicated in one direction, lagging strand replicated in the other

Question 2

Plasmid

Answer 2

Extra chromosomal DNA that cannot link up with chromosomal DNA

Question 3

Episome

Answer 3

Extra chromosomal DNA that CAN link up with chromosomal DNA (eg. A virus integrates its genetic material into host chromosomal DNA)

Question 4

Operon

Answer 4

Genes coding for functionally related proteins are clustered in the same area of the DNA

Question 5

What size genomes do bacteria, archaea and virus’s have?

Answer 5

Smaller, compact genomes

Question 6

What size genomes do eukaryotes have?

Answer 6

Larger genomes

Question 7

In bacterial genomes explain the relationship between genome size and number of ORFs in the total genome

Answer 7

Linear relationship

As genome size increases they have more ORFs in the genome