Prokaryotic Cells

Question 1

Prokaryotic

Answer 1

Unicellular

DNA not in a nucleus

Organelles not membrane-bound

Store their energy as glycogen granules _ oil droplets.

Question 2

DNA

Answer 2

Prokaryotes only have one molecule of DNA, a chromosome

The genes on that chromosome are often grouped into operons

Question 3

Define operons

Answer 3

A no. of genes are switched on or off at the same time.

Question 4

Ribosomes

Answer 4

Smaller in prokaryotic

Their size is determined by the rate at which they settle.

Question 5

Cell wall

Answer 5

Prokaryotic cells have a wall made from peptidoglycon (murein)

Question 6

What is peptidoglycon (murein)?

Answer 6

A complex polymer formed from amino acids + sugars.

Question 7

Define “endosymbiosis”?

Answer 7

Mitochondria, chloroplasts + possibly other eukaryotic organelles were free living bacteria.

Question 8

What are mesosomes + function?

Answer 8

Infoldings of the prokaryotic cell membrane and they carry out aerobic respiration.

Question 9

Purpose pf cell wall?

Answer 9

protects from mechanical forces and water potential changes and water potential damage.