Cells study guide Flashcards
what structures serve as the skeleton,filaments of the cells
microfilaments, intermediate filaments and microtubules
what is the easiest phase to see on a slide
metaphase
RNA uses transcription in what place, to do what?
RNA uses transcription in the nucleus to record the DNA code, then translate outside the nucleus so that ribosomes can make proteins
What do peroxisomes contain and what do they neutralize?
Contain oxidizing enzymes and they neutralize free radicals
function of the plasma membrane
Regulates the movement of materials, participates in signal transduction, helps w/ cell id and helps cells adhere to other cells
what disappears and becomes visible in Prophase
Nucleoli disappear
Chromosomes become visible
what have the chromosomes done in telophase
uncoil, form back to chromatin
What is the basic structure of life and the smallest unit in a living organism?
cells
What protein is microfilaments made of
actin, cause various cellular movements
Describe the plasma membrane
extremely thin
Selectively-permeable. Separates body into 2 major compartments, intracellular fluid inside the cells and extracellular fluid outside of the cells
wat extends from the surface of the cell
glycocalyx
what is a free radical
highly reactive chemical with unpaired electrons that can scramble the structure of biological molecules.
Nucleolus reappears during what phase
telophase
The cell cycle continues from the time a cell is formed until…when?
it dies or divides
lysosomes contain whaat
DIGESTIVE enzymes to break up old cell components and bacteria
aka Demolition crew of cell/suicide bags