College Name: Liberty University
Subject: Biology
Course Code: BIO9823312
Title: Week 1 Assignment
Question 40528: Cell Organization & Membranes Pre-Class Worksheet Fill out this worksheet as you complete your pre-class assignments. Bring your completed worksheet to class to use as a reference for in-class activities. After completing your pre-class assignments, you should be able to: Identify the structures of different lipids: triglycerides, fatty acids, phospholipids, and cholesterol Differentiate between saturated and unsaturated fatty acids Describe the structure of the plasma membrane and the different ways that proteins can be associated with the lipid bilayer Compare and contrast the organization of prokaryotic/eukaryotic cells and plant/animal cells Define the terms organelle, cytoplasm, and cytosol Describe the function of common eukaryotic organelles: mitochondria, chloroplast, nucleus, endoplasmic reticulum, Golgi apparatus, lysosome, and vacuole 1. Sections 2.5 and 3.2 and the video Lipids describe several different types of lipid molecules. Several of these lipid molecules are shown below. Label each molecule as a triglyceride, fatty acid, phospholipid, or cholesterol. 18351526416000 26879553238600 412750024130 1270067310 2. Examine the phospholipid molecule shown in the previous question. This phospholipid contains one saturated fatty acid and one unsaturated fatty acid. Label each fatty acid on the diagram above and then briefly explain how you were able to distinguish them from each other. 3509222-220345f f 3. Refer to figure 3.9 in your textbook. Then, on the diagram shown at right, label whether each protein (a-f) is a peripheral or integral membrane protein. Are any of these proteins transmembrane proteins? 4. In 1972 two biologists proposed the fluid mosaic model to describe the structure of cell membranes. What do the terms fluid and mosaic mean in reference to the structure of cell membranes? 5. Define each of the terms below. Organelle: Cytoplasm: Cytosol: 6. Using Figure 3.19 and the Inside a Cell activity as references, label the following organelles on the diagram below: nucleus, mitochondria, endoplasmic reticulum, Golgi, lysosome. Briefly describe each organelles function in the cell. 7. The diagram above (Question 6) is an animal cell. How is this cell different from a typical prokaryotic cell? 8. The diagram above (Question 6) is an animal cell. How is this cell different from a typical plant cell?