BIOL120 Lecture Notes - Lecture 2: Plasmodesma, Phospholipid, Rechargeable Battery
Document Summary
Cytoskeleton determines cell shape, organelle anchoring and cargo movement. Network of thread-like proteins found throughout the cytosol (fluid part of the cytoplasm) Three main components (threadlike proteins): each type of component varies in diameter with two of the three types forming hollow tubes. Cytosol fluid component of the cytosol which have the embedded proteins that maintain the hape of the cell. Microtubules long hollow tubes (biggest) that move cell components such as molecules, organelles and chromosomes. Microtubules also move cells or multicellular organisms through water. Made up of alpha and beta tubulin proteins. Stacked in 13 rows to form an alpha helix. Vary in length (200-150,000 nm) depending on function. Are part of appendages involved in cell motility called flagella and cilia. Both are composed of 9 pairs of microtubules arranged in a circle with 2 in the centre (9+2 pattern) Microfilaments smallest diameter threads, made up of actin. Organized into helical chains twisted around each other.