Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 13.2PS
True or False. Identify each of the following statements as true (T) or false (F). Provide a brief justification for your answer.
(a) The minus end of microtubules and microfilaments is so named because subunits are lost and never added there.
(b) The energy required for tubulin and actin
(c) Microtubules, microfilaments, and intermediate filaments all exist in a typical eukaryotic cell in dynamic equilibrium with a pool of subunit proteins.
(d) Latrunculin A treatment, which blocks actin polymerization, would block intracellular movements of Listeria.
(e) An algal cell contains neither tubulin nor actin.
(f) All of the protein subunits of intermediate filaments are encoded by genes in the same gene family.
(g) All microtubules within animal cells have their minus ends anchored at the centrosome.
(h) As long as the actin monomer concentration is above the overall critical concentration, actin monomers to which CapZ are attached will continue to elongate.
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structure. They provide the matrix or ground substance of extracellular tissue spaces in
which collagen and elastin fibers are embedded. Hyaluronic acid, chondroitin 4-sulfate,
heparin, are among the important glycosaminoglycans.
10. Glycoproteins are a group of biochemically important compounds with a variable
composition of carbohydrate (1-90%), covalently bound to protein. Several enzymes,
hormones, structural proteins and cellular receptors are in fact glycoproteins.
Chapter 2: CARBOHYDRATES
SELF-ASSESSMENT EXERCISES
I. Essay questions
1. Define and classify carbohydrates with suitable examples. Add a note on the functions of
carbohydrates.
2. Describe the structure and functions of mucopolysaccharides.
3. Give an account of the structural configuration of monosaccharides, with special reference to
glucose.
4. Discuss the structure and functions of 3 biochemically important disaccharides.
5. Define polysaccharides and describe the structure of 3 homopolysaccharides.
III. Fill…
Please help me with this question. More than one answer may be correct.
The + side of a microtubule _____.
Options:
A)
will be attached to the cell membrane
B)
will have a β subunit
C)
will have a high rate of polymerization than the - end
D)
will have an α subunit
E)
will have a lower rate of polymerization than the - end
Please help me with this question. More than one answer may be correct.
Elastin _______.
Options:
A)
has a repeating structure of 3 amino acids such as Gly-Pro-X
B)
crosslinks with numerous other elastin peptides to make an elastic fiber
C)
is physically attached to the smooth endoplasmic reticulum
D)
is physically attached to ribosomes
E)
is rich in hydrophobic residues
Chapter 13 Solutions
Becker's World of the Cell (9th Edition)
Ch. 13 - Cytoskeletal polymers are modular, and their...Ch. 13 - How could you use paclitaxel, which makes MTs less...Ch. 13 - The amount of dynamic instability exhibited by...Ch. 13 - Prob. 13.3CCCh. 13 - In which of the following cells would you expect...Ch. 13 - Filaments and Tubules. Indicate whether each of...Ch. 13 - True or False. Identify each of the following...Ch. 13 - Prob. 13.3PSCh. 13 - Stabilization and the Critical Concentration....Ch. 13 - Prob. 13.5PS
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