Cells Tissues and Organs Flashcards
(25 cards)
Light microscopes can magnify things by how much?
several hundreds of times
Electron microscopes can magnify things by how much
Hundred thousand times
What is the function of the nucleus
Controls all activities of the cell
What do the Nucleus contain?
chromosomes and instructions for making new cells
What is the function of cytoplasm?
most chemical reactions needed for life happen in the cytoplasm
What is the function of the cell membrane?
Controls the passage of substances in and out of the cell
What is the function of the mitochondria
“the power house of the cell” where oxygen is used and most of the cells energy is released during respiration.
What is the function of the ribosomes?
Protein synthesis takes place in the ribosomes
What do both animal and plant cells have?
cell membrane, ribosomes, mitochondria, cytoplasm, Nucleus.
What do plant cells have that animal cells do not?
Chloroplasts, permanent vacuole, cellulose cell wall.
What is the function of the cell wall?
Strengthens the cell and gives it support
What is the function of the chloroplast?
Contains the green substance known as chlorophyll
Where can we find chloroplast?
in the green parts of plants
What is the function of chlorophyll?
to adsorb light energy to make food by photosynthesis
What is the function of the permanent vacuole
contains cell sap, supports the cell and makes it more rigid.
When you culture bacteria on an agar plate you grow many millions of bacteria which can then be what?
visible with the human eye.
what is the function of the genetic material?
it stores DNA in a long circular string like form (it’s loose in the cell)
what is the function of the plasmids?
they carry extra DNA, usually found in small circular bits.
what properties do bacteria cells have that animal cells don’t
Flagella, slime capsule, genetic material, plasmids, cell wall.
describe how yeast reproduces
asexual budding (cell grows out from original cell and forms a seperate cell)
what waste products does yeast make during anaerobic respiration?
ethanol and carbon monoxide.
what do we call the anaerobic respiration from yeast?
fermentation.
many cells in many organisms are what?
specialised cells
name the properties of fat cells
Nucleus, small volume of cytoplasm, few mitochondria, large fat store, cell membrane.
