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 3, Problem 3.1PS
Polymers
- (a) Cellulose
- (b) Messenger RNA
- (c) Globular protein
- (d) Amylopectin
- (e) DNA
- (f) Fibrous protein
Properties
- 1.
Branched-chain polymer - 2. Extracellular location
- 3. Glycosidic bonds
- 4. Informational macromolecule
- 5. Peptide bond
- 6. β linkage
- 7. Phosphodiester bridge
- 8. Nucleoside triphosphates
- 9. Helical structure possible
- 10. Synthesis requires a template
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Students have asked these similar questions
Long explanations are not needed. Direct answers would suffice.
a. Carbohydrates can function in livings systems as any of the following, EXCEPT:
i. storage of energy
ii. structural and mechanical support
iii. aid in cell surface recognition
iv. storage of genetic information
v. source of ATP when catabolized
b. Which of the following structural representations best describes an open-chain monosaccharide, either an aldose or a ketose?
i. Fischer projection
ii chair conformation
iii boat conformation
iv. Haworth projection
cotton. Which aspect of the structure of cellulose accounts for its strength?
Cellulose is an abundant structural polysaccharide found in plant cell walls, wood, and
interchain hydrogen bonding between extended molecular chains
repeating unit of N-acetylglucosamine
a(1→4) linkages between glucose units
branches that occur every 12-30 residues
forms a helical conformation in water
Which of the following is not correct about chitin?
fundamental constituent of the exoskeletons of crustaceans, insects, and spiders
b)
chitin chains form extended ribbons that pack side-by side
a)
similar to cellulose but with repeating units of N-acetyl-D-glucosamine
c)
d)
found mainly in the liver in humans, making up as much as 10% of liver mass
stacked sheets of chitin strands are stabilized by intrastrand, interstrand, and
intersheet hydrogen bonds
11:14
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…
Chapter 3 Solutions
Becker's World of the Cell (9th Edition)
Ch. 3 - What structural features of protein molecules...Ch. 3 - Prob. 3.1CCCh. 3 - Like proteins, nucleotides are important...Ch. 3 - Polysaccharides are also important macromolecules...Ch. 3 - Prob. 3.4CCCh. 3 - Polymers and Their Properties. For each of the six...Ch. 3 - Stability of Protein Structure. Several different...Ch. 3 - Prob. 3.3PSCh. 3 - Prob. 3.4PSCh. 3 - Hair Versus Silk. The a-keratin of human hair is a...
Ch. 3 - The Permanent Wave That Isnt. The permanent wave...Ch. 3 - Features of Nucleic Acids. For each of the...Ch. 3 - Wrong Again. For each of the following false...Ch. 3 - Prob. 3.9PSCh. 3 - Prob. 3.10PSCh. 3 - Telling Them Apart. For each of the following...Ch. 3 - Prob. 3.12PSCh. 3 - Prob. 3.13PSCh. 3 - QUANTITATIVE Thinking About Lipids. You should be...Ch. 3 - Shortening. A popular brand of shortening has a...
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- Hemicellulose isa. a cross-linked glucose polymer.b. partially digested cellulose.c. a five-carbon sugar polymer.d. a complex of cellulose with lignin.arrow_forwardProteins are quite stable. The lifetime of a peptide bond in aqueous solution is nearly 1000 years. However, the free energy of hydrolysis of proteins is negative and quite large. How can you account for the stability of the peptide bond in light of the fact that hydrolysis releases much energy?arrow_forwardSweet proteins. List the key classes of glycoproteins, their defining characteristics, and their biological functions.arrow_forward
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- Biochemistry. (i) Explain the chemical structure of Echinolone and where it has found. (ii) state the nature of Echinolone such as volatile or non-volatile. Why? (iii) Explain the physical and chemical properties of Echinolone.arrow_forwardInstruction for the said activity: Write the structure of each of the following peptide at pH7 and identify how many peptide bond in each number. d. Alanyl-phenylalanine- aspartate- cysteine e. Threonyl- Isoleucyl-methionyl- leucine f. Lysyl-alanine -Phenylalanyl-tyrosyl- serinearrow_forwardLong explanations are not needed. Answers and brief descriptions would be enough. During the formation of the peptide bond which of the following takes place? a. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from the amino group of another amino acid. b. Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from the amino group of another amino acid. c. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from the amino group of another amino acid. d. Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from the amino group of another amino acid.arrow_forward
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