3.2.1.2 Prokaryotic cells

Question 1

Example of prokaryotic cells

Answer 1

bacteria

Question 2

Differences to eukaryotic cells

Answer 2

. Smaller
. No membrane-bound organelles
. (Which includes) no membrane bound nucleus
. Single circular chromosome vs multiple linear chromosomes
. DNA is not associated with proteins

Question 3

What do all prokaryotic cells have

Answer 3

. Cytoplasm
. Cell membrane
. Ribosomes (70s smaller than eukaryotic)
. Single circular DNA molecule in cytoplasm
. Cell wall made of murein (glycoprotein)

Question 4

Many prokaryotic cells also have:

Answer 4

. One or more plasmids (smaller rings of DNA)
. Capsule surrounding cell
. One or more flagella

Question 5

What do all viruses have

Answer 5

. Genetic material (DNA, RNA, or ssDNA)
. Protein capsid
. Attachment proteins part of the capsid or the lipid envelope if present

Question 6

Some viruses have:

Answer 6

. Lipid envelope
. Enzymes within the matrix e.g. reverse transcriptase