Key Concepts In Biology Flashcards
Nucleus role
Has genetic material (arranged in chromosomes) to control cell activity
Cell membrane role
Holds cell together, controls what enters and exits
Mitochondria role
Where most reactions for respiration occur
Ribosomes role
Where translation stage of protein synthesis occurs
Cell wall role
Supports and strengthens cell
Vacuole role
Has cell sap to maintain internal water pressure
Chromosomal DNA role (Bacterial Cell)
Controls cell activity and reoplication
Plasmid DNA role (Bacterial Cell)
Small loops of extra DNA, stores genes such as for drug resistance
Flagellum role
Tail-like, allows its cell to move
Acrosome role (Sperm Cell)
At the front of the head, stores enzymes to digest through the egg cell membrane.
Why does an egg cell have nutrients in its cytoplasm
To feed the embryo
What happens to the membrane of an egg cell after fertilisation
Changes shape to prevent more sperm entering
Describe ciliated epithelial cells
They line the surfaces of organs, there to move substances along in one direction
