B1 Flashcards
what is differentiation
cells changing to become specialised for there job
what are undifferentiated cells called
stem cells
what do chromosomes contain
genetic info
how many pairs of chromosomes are there
23
what is mitosis
when a cell divided
what are the two main stages of the cell cycle
growth + DNA replication
Mitosis
what is diffusion
spreading of particles from an area of high concentration to low
what is osmosis
movement of water molecules across a partially permeable membrane from a region of high water concentration to low
what is active transport
substances that are absorbed against a concentration gradient
substances that are absorbed against a concentration gradient from low to high is called
active transport
what is it called when a cell divides
mitosis
where are eukaryotic cells found
plants, fungi and protists
what is a eukaryote made up of
eukaryotic cells
what happens when cells differentiate
they aquire a different sub cellular structure
are bacteria cells eukaryotic or prokaryotic
prokaryotic
what is mitochondria for
aerobic respiration
what happens in the cytoplasm
chemical reactions
what is prokaryotic cells an example of
bacteria
what do microscopes allow us to do
magnify
how big are eukaryotic cells
10-100 micrometres
what organelle is responsible from releasing energy
mitochondria
what organelle is responsible for storing DNA
nucleus
what is the process where a cell develops a new sub cellular structure to perform a specific function
cell differentiation
why does chlorophyll do
help things synthesise
