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Transcript
AP Biology Chapter 4 Guided Reading Assignment Name _________________________ 1. How does an electron microscope work and what is the difference between a scanning and transmission electron microscope? 2. Describe the process and purpose of cell fractionation. 3. Label the prokaryotic cell below – list structure and function. 4. Why is surface area to volume such an important concept as it applies to the size of a cell? THIS IS A CRITICAL CONCEPT! Page 1 of 5 5. For each of the structures below – note the specific structure and the function of the organelle or part of the organelle. The important concept is to note how the specific structure allows for the specific function to be accomplished. a. Nucleus i. Nuclear envelope ii. Nuclear lamina iii. Chromosomes iv. Chromatin v. Nucleolus b. Ribosomes c. Endoplasmic reticulum i. Smooth ER ii. Rough ER d. Golgi Apparatus e. Lysosomes Page 2 of 5 f. Vacuoles i. Food ii. Contractile iii. Central w/tonoplast g. Endomembrane system – overall h. Mitochondria i. Mitochondrial matrix ii. Cristae i. Plastids i. Amyloplast ii. Chromoplast iii. Chloroplast 1. thylakoids 2. stroma j. peroxisomes Page 3 of 5 k. cytoskeleton – pay careful attention to the details in this section i. microtubules 1. centrosomes and centrioles 2. cilia and flagella – include basal body 3. dynein walking ii. microfilaments 1. actin 2. myosin 3. pseudopodia 4. cytoplasmic streaming iii. intermediate filaments l. Cell walls i. Primary cell wall Page 4 of 5 ii. Middle lamella iii. Secondary cell wall m. Extracellular matrix i. Collagen ii. Proteoglycans iii. Fibronectin iv. Integrins n. What are intercellular junctions and why are they important? o. Contrast plasmodesmata, tight junctions, desmosomes, and gap junctions. Which type of cells have these structures? Page 5 of 5