Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 4, Problem 1Q
If a scientist were studying a disease in which membrane composition was altered, how would she isolate these membranes?
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Chapter 4 Solutions
Becker's World of the Cell (9th Edition)
Ch. 4 - Why do scientists currently believe that RNA,...Ch. 4 - You have discovered a new organism living in...Ch. 4 - If a scientist were studying a disease in which...Ch. 4 - Imagine that you are building an artificial...Ch. 4 - If viruses are nonliving particles, how can they...Ch. 4 - Wrong Again. For each of the following false...Ch. 4 - Prob. 4.2PSCh. 4 - Toward an Artificial Cell. Scientists have...Ch. 4 - Sentence Completion. Complete each of the...Ch. 4 - Telling Them Apart. Suggest a way to distinguish...
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- Why is it advantageous for the cell membrane to be fluid in nature?arrow_forward1) All of the following are functions of proteins within a membrane except __________. A)Maintaining the fluidity of membranes B)transport ions and other polar substances C)receptors to bond molecules outside of the cell D)helping the body to recognize its own cells 2) Which of the following organelles is not part of the endomembrane system A)mitochondria B)golgi apparatus C)lysosomes D)rough endoplasmic reticulum 3) Which cytoskeletal element is composed of actin and is involved with muscle contraction and provided strength to cells during stretching and compression? A)Microfilimants B)Intermediate filaments C)Microtubules D)Flagellaarrow_forwardSo I'm working on a homework assignment and think I've identified most everything except the "cell membrane". Could you please help me identify where it would be on this?arrow_forward
- 12) Match the cell-cell junction on the left with the appropriate function on the right. Note that more than one letter may apply for a particular function and that each letter may be used more than once or not at all. A) Gap junctions provides a very strong attachment point between cells B) Desmosomes allow easy movement of large amounts of substances between adjacent cells C) Plasmodesmata seals the plasma membranes of adjacent cells together, preventing the movement of molecules between them D) Tight junctionsarrow_forwardWhich among the following defines GPI anchored proteins? 1)Integral proteins of the plasma membrane 2)Peripheral proteins of the plasma membrane 3)Proteins that bind to ion-gated channels in the plasma membrane 4)Proteins which randomly bind to lipids of the plasma membranearrow_forwardList and describe the three main types of cytoskeleton. If you wanted to do immunocytochemistry to specifically stain each type of cytoskeleton, what is a protein that could be used for each cytoskeletal type (in other words, what is a unique protein for each cytoskeletal type)? What are three types of actin structures? Describe the involvement of actin structures in cell migration. How is the growth and shrinking of microtubules regulated? Then describe the roles of microtubules in: chromosomal separation during mitosis and the movement of organelles and vesicles within a cell. Describe a possible mechanism on how signaling pathways might impact the cytoskeleton, so that cell migration could be regulated in a localized manner within a multicellular organism. (hint: think about the possible transcriptional regulation of the G-protein regulators) What are 2 main challenges of protein targeting? Then describe one way these challenges are overcome during signal-based targeting and one way…arrow_forward
- A fluorescent molecule of 2000 daltons is microinjected into a single cell of an epithelial layer. When the layer is examined in a fluorescence microscope, the molecule remains confined to that cell. However, when a fluorescent molecule of 800 daltons is injected into a single cell of an epithelial layer, it quickly appears in the adjacent cells. Which of the following is responsible for the spread of the smaller molecule? 1. A) Desmosomes (maculae adherentes) 2. B) Focal contacts 3. C) Gap junctions 4. D) Intermediate junctions 5. E) Tight junctions (zonulae occludentes)arrow_forwardWhy is the structure of the plasma membrane considered to be a fluid-mosaic model?arrow_forwardWhich of the following describes the plasma membrane? 1) phospholipid bilayer surrounding the cell 2) a membrane composed of tiny shelves or cristae 3) single-layered membrane that surrounds the nucleus of the cell 4) double layer of protein enclosing the plasmaarrow_forward
- describe the structure and function of: a) Two cell components that are found in both eukaryotic and prokaryotic cells. b) Two cell components that are found in eukaryotic cells only (plant or animal). c) Two cell components that are often found in prokaryotic cells only.arrow_forwardA) Describe in as much detail as you can, the fluid mosaic model of a cellular membrane. B) What is special about the phospholipid in the cell membrane? C) Name four components of the fluid mosaic model and their function in the membrane.arrow_forwardWhy are lysosomes known as “the cleaners” of the cell waste?arrow_forward
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