Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 3, Problem 2FIB
Summary Introduction
Introduction:
The subunits of proteins are held together by the help of bonds called amino acids. The bonds within the atoms are also held by hydrogen bonds. The amino acid cysteine has sulfur-containing R group which forms covalent disulfide bonds.
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which of the following is correct about the structure of proteins?
a- the number of peptide bonds is equivalent to the number of amino acid residues
b- the secondary structure of proteins are mostly stabilized by hydrophobic interactions
c- protiens mostly composed of polar amino acids will have an elongated (fibrous) tertiary structure
d- the quaternary structure of a protein is formed between or among similar polypeptides only
Which statement about quaternary structure is TRUE?
Quaternary structure is unaffected by acids or heat.
Quaternary structure is determined by the same interaction that holds an α-helix together.
Quaternary structure is how prosthetic groups are held in a protein.
Quaternary structure is the position of subunits in the overall structure of a protein.
All proteins have quaternary structure
Which of the following best represents the backbone arrangement of two peptide bonds?
A) Ca—N—Ca—C—Ca—N—Ca—C
B) Ca—N—C—C—N—Ca
C) C—N—Ca—Ca—C—N
D) Ca—C—N—Ca—C—N
E) Ca—Ca—C—N—Ca—Ca—C
Chapter 3 Solutions
Biology
Ch. 3.1 - which of these is/are polar molecules? (you may...Ch. 3.1 - define organic molecules and explain why carbon is...Ch. 3.1 - explain why functional groups are important in...Ch. 3.1 - name and describe the properties of seven...Ch. 3.2 - define organic molecules and explain why carbon is...Ch. 3.3 - Describe hydrolysis of this molecule.Ch. 3.3 - describe the major types of carbohydrates?Ch. 3.3 - provide examples of each type of carbohydrate and...Ch. 3.4 - Look up the rest of the amino acids and. based on...Ch. 3.4 - Infectious prions such as those that cause mad cow...
Ch. 3.4 - Why do many proteins, when heated excessively....Ch. 3.4 - Why a Perm Is (Temporarily) Permanent?Ch. 3.4 - describe protein subunits and how proteins are...Ch. 3.4 - explain the four levels of protein structure and...Ch. 3.4 - list several functions of proteins and provide...Ch. 3.4 - Prob. 4CYLCh. 3.5 - describe the general structure of nucleotides?Ch. 3.5 - list three different functions of nucleotides?Ch. 3.5 - explain how nucleic acids are synthesized?Ch. 3.5 - give two examples of nucleic acids and their...Ch. 3.5 - Puzzling Proteins All cells use DNA as a blueprint...Ch. 3.6 - What kind of reaction breaks this molecule apart?Ch. 3.6 - An obese 55-year-old woman consults her physician...Ch. 3.6 - Why are steroid hormones able to diffuse through...Ch. 3.6 - compare and contrast the structure and synthesis...Ch. 3.6 - describe the functions of fats, oils, and waxes?Ch. 3.6 - Prob. 3CYLCh. 3.6 - Prob. 1CTCh. 3 - Polar molecules a. dissolve in lipids. b. are...Ch. 3 - Prob. 2MCCh. 3 - Prob. 3MCCh. 3 - Which of the following is not composed of...Ch. 3 - Prob. 5MCCh. 3 - In organic molecules made of chains of subunits,...Ch. 3 - Prob. 2FIBCh. 3 - Prob. 3FIBCh. 3 - Prob. 4FIBCh. 3 - Fill in the following with the appropriate type of...Ch. 3 - Prob. 1RQCh. 3 - List the four principal classes of biological...Ch. 3 - Prob. 3RQCh. 3 - Prob. 4RQCh. 3 - Prob. 5RQCh. 3 - Describe the synthesis of a protein from amino...Ch. 3 - Where in nature do we find cellulose? Where do we...Ch. 3 - Based on their structure, sketch and explain how...Ch. 3 - Prob. 2ACCh. 3 - Prob. 3AC
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- What kinds of bonds often control the shape (or tertiary form) of large molecules such as proteins? a. hydrogen b. ionic c. covalent d. inert e. singlearrow_forwardWhich of the following is a class of molecules that encompasses all of the other molecules listed? a. triglycerides b. fatty acids c. waxes d. steroids e. lipids f. phospholipidsarrow_forwardWhich of the following statements about proteins is correct? There are 20 types of amino acids commonly found in proteins. Proteins are composed of glyosidic bonds. Proteins are never folded. They do not contain any hydrophilic or hydrophobic residues. Peptide bonds are composed of only carbon and oxygen atoms.arrow_forward
- What type of bonding is present in the primary structure of proteins? A. peptide bond B. hydrogen bond C. ionic bond D. more than one choice is correctarrow_forwardMatch the following macromolecules:___Polysaccharides (a) Protein___Polypeptide (b) Chromosomes___Fat (c) Lipids___DNA (d) Carbohydrate___Steroidsarrow_forwardfill the following table polymer or large biological molecule monomer or smaller subunit one funtion name od covalent bond nulceic acids three fatty acids easter bond acts as an enzyme immediate or long-term energy source glycosidic linkagearrow_forward
- Define the following terms: a. carbonyl group b. carboxyl group c. amino group d. hydroxyl group e. peptide bondarrow_forwardWhich of the following types of bonds are present in the primary structures of proteins? Covalent bonds, hydrogen bonds and dislufide linkages Ionic interactions Hydrogen bonds and covalent bonds Covalent bondarrow_forwardThe type of molecule in the above question is the MONOMER of which of the following polymers? Lipids Polysaccharides Nucleic acids Proteinsarrow_forward
- You put albumin, the protein responsible for lipid transport through the blood, in methane, a hydrophobic solution. Would you expect albumin to still be functional? Yes the protein would still be functional because its primary structure remains intact Yes the protein would still be functional because it is used to carry lipids No the protein would not be functional because the peptide bonds would be dehydrated No the protein would not be functional because covalent bonds weaken and disrupt secondary structure No the protein would not be functional because the tertiary structure would change to maximize hydrophobic interactionsarrow_forwardWhat type of bond is formed between the nucleotide monomers that is considered as the main stabilizing factor of primary structure of nucleic acid? A. Phosphodiester bond B. Glycosidic bond C. Nitrogen bond D. Hydrogen bondarrow_forwardThe protein hemoglobin, consisting of four polypeptides (two a-globin chains, with 141 amino acids each, and two b-globin chains, with 146 amino acids each), contains how many peptide bonds? 570 peptide bonds 571 peptide bonds 572 peptide bonds 573 peptide bonds 574 peptide bondsarrow_forward
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