Cell biology Flashcards
What structures are in animal cells?
Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes
What structures are extra in plant cells?
Cell wall, permanent vacuole, chloroplasts
What kind of cells are Plants and Animals?
Eukaryotic
What kind of cells are bacteria?
Prokaryotic
Are bacteria cells bigger or smaller than animal and plant cells?
Bacterial cells (prokaryotic cells) are much smaller in comparison
What cells in animals are specialised?
Sperm, nerve and muscles
What cells in plants are specialised?
root hair, xylem and phloem
when do cells differentiate
In mature animals, cell division is mainly restricted to repair and replacement. As a cell differentiates it acquires different sub-cellular
structures to enable it to carry out a certain function. It has become a specialised cell.
What does the nucleus contain?
Contains chromosomes made of DNA molecules
Why is cell division by mitosis important?
It is important in the growth and development of multicellular organisms
What is a stem cell?
a stem cell is an undifferentiated cell of an organism which is capable of giving rise to many more cells of the same type
What is diffusion?
Diffusion is the spreading out of the particles of any substance in solution. This is when particles move from a high conentration toa low cocentration
What is diffusion?
Diffusion is the spreading out of the particles of any substance in solution. This is when particles move from a high conentration toa low cocentration
What is osmosis?
osmosis is the diffusion o water from a dilute solution to a concentrated solution through a partially permeable membrane (when particles move from a high concentration of water to a low concentration of water)
What is active transport?
Active transport moves substances from a more dilute solution to a more concentrated solution. This requires energy from respiration.
(when particles move from a low concentration to a high concentration)
