Textbook Question
Based on what you know of the peptide bonds that link together amino acid residues, why would proline's side chain reduce the flexibility of the backbone?
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2. Cell Chemistry & Cell Components
Proteins
Back2. Cell Chemistry & Cell Components
Proteins
- Textbook QuestionWhich structural level of a protein would be least affected by a disruption in hydrogen bonding?a. primary structureb. secondary structurec. tertiary structured. quaternary structure2738views
- Textbook QuestionMake a concept map (see BioSkills 12) that relates the four levels of protein structure and shows how they can contribute to the formation of hemoglobin. Your map should include the following boxed terms: Primary structure, Secondary structure, Tertiary structure, Quaternary structure, Amino acid sequence, R-groups, αα-helices, and ββ-pleated sheets.2125views
- Textbook QuestionMost proteins are soluble in the aqueous environment of a cell. Knowing that, where in the overall three-dimensional shape of a protein would you expect to find amino acids with hydrophobic R groups?1856views
- Textbook QuestionWhat are the two types of secondary structures found in polypeptides, and what maintains them? What stabilizes the tertiary structure of a polypeptide?1874views
- Textbook QuestionHow can a cell make many different kinds of proteins out of only 20 amino acids? Of the myriad possibilities, how does the cell 'know' which proteins to make?1836views
- Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Proteins are composed of strings of fatty acids linked by glycosidic bonds.
563views - Textbook Question
An enzyme is a:
a. biological catalyst that increases the concentration of the products.
b. biological catalyst that increases the concentration of the reactants.
c. chemical that is used in a reaction, after which it can no longer be used by the cell.
d. biological catalyst that works by bringing its substrates closer to their transition states.
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Why is it important for a protein to maintain its structure? What is it called when a protein loses its structure?
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Differentiate clearly between primary, secondary, and tertiary protein structure.
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After you eat a protein bar, which chemical reactions introduced in this chapter must occur for the amino acids in the protein bar to be converted into proteins in your body cells?
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A deficiency in this element can be expected to reduce the hemoglobin content of blood:
a. Fe
b. I
c. F
d. Ca
e. K
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Pediatricians become concerned about the potential for brain damage when an infant's temperature approaches 105°F. Which class of organic molecules is most likely to be damaged by high temperature? Explain why.
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Which of the following is not a function of a protein?
(a) Support
(b) Transport
(c) Metabolic regulation
(d) Storage of genetic information
(e) Movement
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List seven major functions performed by proteins.
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