Flashcards in Organelles Deck (35)
-small units that are not surrounded by a membrane and have two units
-SITES OF PROTEIN SYNTHESIS
Where are Ribosomes found?
-floating freely in cytosol
-bound to membrane of other organelles
-bound to nucleus
-contain enzymes chemicals produced by cellular reactions
-metabolize fatty acids
Rough Endoplasmic Reticulum
-membrane enclosed sac that is studded with ribosomes.
-protein synthesis and modifies proteins made by ribosomes
-lipid synthesis and detoxification reactions
Where does Golgi Apparatus receive proteins from?
-processes, modifies and sort products from vesicles sent by RER.
-contain digestive enzymes that break down particles brought into the cells, old and worn out organelles or the cell itself
-composed of microtubules
-located in the centrosome
-directs the synthesis of proteins
-surrounded by the nuclear envelope which contains nuclear pores
Chromatin is and its contains?
-found within the nucleus
-a ball like mass of tightly coiled DNA and proteins, RNA and a nucleolus
-double layer membrane that contains the nucleus
-found within the chromatin which is in the nucleus
-contains Ribosomal RNA and site of ribosome synthesis
movement of a solute from an area of high concentration to low concentration
-no energy required
Where does energy come from in difussion
What increases rate of diffusion
-facilitated diffusion (carrier transport)
movement of solvent (water) from area of high solvent concentration to low solvent concentration
Lower solute concentration than the cytosol
cell shrinks due to being placed in a hypertonic solution
cell swells and bursts when placed in hypotonic solution
same solute concentration on both sides of the membrane
4 Stages of Mitosis
Cell Cycle - 4 Phases
G1, S phase, G2 and M phase (mitosis)
second growth phase