BIOLOGY 101 Lecture Notes - Lecture 7: Catalase, Endocytosis, Glycogen

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24 Sep 2016
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Structure: much larger than prokaryotic cells a. i. As cell size increases, surface area/volume decreases a. i. 1. Leads to a diffusion issue because the volume decreases more rapidly than surface area a. i. 1. a. Compartmentalization: organelles membrane is bound structure in cell a. i. 1. a. ii. Cell shape: become thin, flat, and have folds: must be constantly interacting with their environment, contain: c. i. Organelles c. iv. 1. only live in eukaryotic cells (not prokaryotic) Nuclear envelope: double membrane bilayers with pores that allow molecules to move in and out a. iv. Nuclear lamina: shapes nucleus and organizes chromatin a. iv. 1. Made by lamin proteins (intermediate filaments: endomembrane system b. i. Endoplasmic reticulum: involved in protein and lipid synthesis b. i. 1. a. Er signal peptide directs ribosome/protein to the er b. ii. 3. Glycosylation: attachment of oligosaccharide (makes a glycoprotein) b. ii. 3. b. ii. Secreted to outside of sell (if soluble protein with no other zip code) b. ii. 5. b. Plasma membrane (if membrane protein with no other zip code) b. ii. 5. c. Lysosome (if contains lysosomal targeting signal: lysosome c. i.

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