bio quiz Flashcards
who was the first investigator to invent the compound microscope in the early 1600’s
Zacharias Janssen
First man to view living cells
- also discovered bacteria
- discovered free-living and parasitic protists, sperm cells, and blood cells
Anthony Van Leeuwenhoek
person who viewed cork cells that were once living plant cells
Hooke
why do plant cell walls remain intact?
because of the structural carbs, CELLULOSE
Cell theory
- All living things are made of cells
- Cells are the basic unit of structure & function in all organisms
- all cells come from other cells (through the process of cell division - mitosis)
function of the cell membrane (both plant and animal have it)
semi/selectively permeable barrier made of phospholipid & protein , controls what goes in and out of the cell ; MAINTAINS HOMEOSTASIS
function of the cytoplasm (both plant and animal have it)
liquid material inside cell where many reactions occur
function of the ribosome
(BOTH)
synthesizes proteins (including enzymes)
function of the nucleus
(BOTH)
controls all cell activities and function ; contains the genetic material
nucleolus function
makes ribosomes (dense spot located inside the nucleus)
chromatin function
“threadlike” material made of DNA ; usual form of DNA
what are the 2 forms of genetic material?
chromatin & chromosome
chromosome function
coiled, rod like DNA
nuclear membrane function (both plant and animal have it)
surrounds the nucleus, contains nuclear pores that allows materials in and out
mitochondria function (both plant and animal have it)
uses oxygen to release energy from food
- where cellular respiration occurs