Cells And Organelles Flashcards
Lysosome
Membrane-bound vesicle, contains digestive hydrolytic enzymes which opperate at a low pH
Microtules
Tiny, hollow protein tube in cytoplasm
- build mitotic spindle
Plastid
Organelle containing pigment e.g. chloroplast
Plasmodesmata
Connected pits in the cell walls allowing for connection of cytopla between cells
Tonoplast
Membrane around vacuole in plant cells
Cristae
Folds in inner membrane of the mitochondria which priject into the matrix
-greatly increases surface area of inner membrane
Matrix
The inner most part of the mitochondrion
- site of krebs cycle and link reaction
Electron microscope
Microscope in which a beam of electrons is used instead of light
- Transmission of EM can create accurate image of inside of cell (2D)
- Scanning EM used to create 3D image of cell surface
Nuclear envelope
Double membrane surrounding the nucleus in an eucaryote
Nuclear pores
Organised gaps in the nuclear envelope for mRNA to exit and enter through
Centrosome
Organelle consisting of two centrioles found near the nucleus
- involved in the formation of spindle fibres prior to nuclear division
Chromosome
Consists of a long thread of DNA packaged with a protein
- replicates prior to division into chromstids
Stroma
Interior of the chloroplast between the grana filled with fluid
-site of Light Lindependent Reaction
Thylakoid
Membrane system of a chloroplast
Granum
Stack of thylakoid membranes
-site of Light Dependent Reaction
