Retrieval exercise 1

What are 6 features of prokaryotic cells?

• Circular DNA, not associated with protein and not in nucleus

• Form new cells by binary fission

• No membrane-bound organelles

• Has a cell wall made of murein

• Has smaller ribosomes

• May have a capsule, flagella and plasmids

What are 3 features of viruses?

• Genetic material- either DNA or RNA

• Capsid- a protein coat

• Attachment protein- allows the virus to attach to a host cell (complementary to receptors on host cell membrane)

What are two features of the mitrocondria?

• Produces ATP from aerobic respiration

• ATP used by cell for active processes e.g. active transport and protein synthesis

What is the function of the rough endoplasmic reticulum?

Synthesis & transport of proteins through cytoplasm

What is the function of the smooth endoplasmic reticulum?

Synthesises and transports lipids

What do all cells contain?

• A cell-surface membrane enclosing cell contents

• Cytoplasm

• Genetic information

What is an organelle?

a small structure in the cytoplasm that has a specific function e.g. ribosome