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 4.4PS
Sentence Completion. Complete each of the following statements about cellular structure in ten words or less.
(a) If you were shown an electron micrograph of a section of a cell and were asked to identify the cell as plant or animal, one thing you might do is …
(b) A slice of raw apple placed in a concentrated sugar solution will …
(c) A cellular structure that is visible with an electron microscope but not with a light microscope is …
(d) Several environments in which you are more likely to find archaea than bacteria are …
(e) One reason that it might be difficult to separate lysosomes from peroxisomes by centrifugation techniques is that …
(f) The
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The Size of Cells and Their Components:
a. (a) If you were to magnify a cell 10,000 fold (typical of
the magnification achieved using an electron microscope),
how big would it appear? Assume you are viewing a "typical"
eukaryotic cell with a cellular diameter of 50 um.
MAIN IDEA: Eukaryotic cells have an extensive and dynamic framework called a cyto-
skeleton. The cytoskeleton is used for cell shape, internal structure, movement, and cell
division. Many cells are surrounded by and supported by a complex extracellular matrix and
are able to interact with adjacent cells and the environment via cell junctions.
3. List three common components of microtubules and microfilaments.
6. Complete the paragraph to describe how organelles help cells and cell contents
move around. _j
help to move cell components, such as a cell's
during cell division. They rapidly assemble
strengthen
duplicated
hen needed and then disassemble.
and change the shape of a eukaryotic cell. In this way they can help the
cell move. Organized arrays of
are found in
and
of eukaryotic cells. Elongated
or false feet, help
in amoebas'
these single-celled organisms move.
- Describe four examples of extracellular matrix in different organisms.
MAIN IDEA: Eukaryotic cells have an extensive and dynamic framework called a cyto-
skeleton. The cytoskeleton is used for cell shape, internal structure, movement, and cell
division. Many cells are surrounded by and supported by a complex extracellular matrix and
are able to interact with adjacent cells and the environment via cell junctions.
5. List three common components of microtubules and microfilaments.
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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- Cell Structure Reflects Function What advantages are there in having the interior of the cell divided into a number of compartments such as the nucleus, the ER, lysosomes, and so forth?arrow_forwardImage analysis. The outer boundary of the cell is the plasma membrane.In the image below, molecules that cannot cross the membrane are glucose and ions.Why can't they cross the membrane? [MA] (c) (d) (a) Small uncharged molecules (b) Lipid-soluble Water-soluble substances lons substances Glucose Hydrocarbon Nat K+ H20 CO2 H+ cF Cat+ NH3 O They are hydrophobic O They are hydrophilic O large O Na, K, Ca and H ions will bind with phosphate Chloride ions will be repelled by phosphate they are small in size toarrow_forwardDifferent organelles are abundant in different cell types. Match the cell types with their abundant organelles by placing the correct letter from column B into each blank in column A. Follow the hints provided in parentheses.Column A Column B(1) cell in the adrenal gland that makes steroid hormones (a) mitochondria(2) white blood cell (phagocytic) (b) smooth ER(3) liver cell (detoxifies poisons) (c) peroxisomes(4) muscle cell (highly contractile) (d) microfilaments(5) mucous cell (secretes protein product) (e) rough ER(6) epithelial cell in the outer layer of skin (withstands tension)…arrow_forward
- Cell Membrane and Cell Transport WebQuest Part I: Cell Membranes Go to the following website: www.biology4kids.com/ files/cell_membrane.html 1. How is the cell membrane similar to a plastic bag with tiny holes? 2. What two components make up the cell membrane? a. What are their functions? 3. What is the fluid mosaic model? 4. Sketch a section of the cell membrane, showing both phospholipids and proteins. Label your drawing. 5. Label the diagram of the phospholipid molecule below with the following terms: hydrophilic head, hydrophobic tail This diagram shows a Head simplified version of a phospholipid molecule. Tailsarrow_forwardBiology a. Assuming a protein is present in the cell at 1 µM concentration, how many copies of that protein are present (on average) in a 1 µm3 volume (roughly the volume of a bacterium)? b. What is the corresponding volume per molecule in nm3? c. If the protein were approximately spheres with diameter 5 nm, what fraction of the volume would the protein (still at 1 µM) occupy? d. Repeat part a of this question, but now with concentration 1 nM. e. Repeat part a of this question, but now for a yeast cell (assume yeast cell is a sphere with diameter 5 µm)..arrow_forwardplease choose correct letter and explain a bit 1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds b) disulfide bonds c) star war forces d) van der Waals forces 2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by: a) glycoproteins b) feet c) microtubules d) actin filaments True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.arrow_forward
- What I Can Do Cells are highly organized structures with parts that perform specific functions. Starting from the cell membrane with its incomparable abilities not only to provide shape and flexibility to the cell but also to determine the nature of its interaction with its environment. For you to recognize these functions, make an illustration (with a title) that shows a place which resembles a cell membrane. Also, write the things that you think they are similar. Your product will be assessed based on the following criteria: organization and content accuracy, appropriateness of elements, creativity, and appearance. The actual rubric to be used in assessing your product will be found on page 21. Assessment Let's see how well you have enjoyed the amazing world of çell cycle and mitosis byarrow_forwardDescribe how Ribosomes interact with at least 10 other organelles in a normal cell. (Please be detailed and use full sentences, but try to describe it in a way that a somewhat beginner could grasp.) Thank you!!!!!!arrow_forwardPlease help me with this question. More than one answer may be correct. Kinesin _______. Options: A) uses ATP B) “walks” the same direction as dynein C) can bind to a kinesin receptor on a vesicle D) “walks” along a microtubule from the – side to + side E) “walks” along a microtubule from the + side to - sidearrow_forward
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