Miss Lee - Cell Utra Structure And function Flashcards
Nucleus structure
Double nucleus envelope, stores DNA. Has nucleolus located in it and a nucleus
Nucleus function
Controls the cell Contains DNA
makes ribosomes
Double membrane proteds the nucleus from damage
has pores
Endoplasmic reticulum structure
Smooth ER - no ribosomes has a system of tubules
Rough ER - studded with ribosomes
ER - stacks of membrane bound fluid, stacks of cisterne
Endoplasmic reticulum function
RER - site of protein synthesis
SER - carbohydrate and lipid synthesis and storage
Golgi apparatus structure
Stacks of flattened membrane bound stacks called cisterne
Golgi apparatus function
Allows internal transport
Receives proteins from RER
Modifies and processes molecules into vesicles as new lipids and proteins
Lipid synthesis
Makes lysosomes
Secretary vesicles leave the cell or igosomes which stay in the cell
Ribosome structure
A 2 sub unit organelle
Made from RNA and protein
Freely floating around cytoplasm
Or attached to RER
Ribosome function
Site of protein synthesis
Mitochondria structure
Oval shaped
Two membrane (double membrane)
Inner membrane forms finger like structure (called Cristae ) larger SA
Matrix contains enzymes for respiration
Mitochondria DNA to reproduce and create enzymes
Mitochondria function
Site of aerobic respiration and release of ATP carrier cells
Lysosomes structure
They are spherical surrounded by a single membrane
Lysosomes function
They contain hydrolytic digestive enzymes know as lysosomes they break down worn out or components of the cell or digest invading cells
Centrioles structure
A component of the cytoskeleton
Composed of many microtubules
Small hollow cylinders that occur in pairs next to the nucleus in animal cells only
Each centriole contains a ring of 9 microtubules
Centrioles function
Makes copies of itself in cell division and then helps to form spindle non cell division
Cilia structure
Hair like extensions that protrude from some animal cell types
Outer membrane 9 pairs of proteins and two in the middle a 9+2 arrangement and allows movement