Your study group is trying to identify differences in the four levels of protein structure. The...
Homework Answers
The secondary structure of protein is stabilized by H-bonding between the oxygen of the backbone carbonyl and the hydrogen of the backbone amine.
The secondary structure of protein is of two types-
1. 
- helix structure 2. 
- sheet structure
In
- helix structure the H-bonding occur between the O of each C=O
bond in the strand and the H of each N-H group of amino acid in the
helix i.e bonding occurs within the strands. On the other hand , in
- sheet structure H-bonding occurs between the strands i.e
inter-strand rather than within the strands. The C=O in one strand
bonds with the H of the N-H group of the adjacent strand.
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Your study group is trying to identify differences in the four
levels of protein structure. The...
2) At a pH greater than that of its isoelectric point, the structure of glycine is...
2) At a pH greater than that of its isoelectric point, the structure of glycine is a) H-CH-COOH b) H-CH-C00- c) H-CH-CO e) H-CH-COO COOH b) H-CH-C00- c) H-CH-COOH d) H-CH-COO NH2 NH2 NH2 NH3 NH 3) Which of the following structures can be destroyed by the dena structures can be destroyed by the denaturation of a protein? a) Only primary and tertiary structures of a protein. b) Only secondary, tertiary y secondary, tertiary, and quaternary structures of a protein....
In most cases, mutations in the core of a protein that replace a smaller nonpolar side...
In most cases, mutations in the core of a protein that replace a
smaller nonpolar side chain in the wild-type (e.g., Ala, Val) with
a larger nonpolar side chain (e.g., Leu, Ile, Phe, Trp) in the
mutant, result in significant destabilization and misfolding of the
mutant. What feature of the protein core explains this observation?
Why would such a mutation prevent a protein from folding
properly?
Reset Help disulfide bridges small van der Waals contacts side chains in the protein...
1. Which of the following statements is consistent with the structural motifs in 1OPF? This protein...
1. Which of the following statements is consistent with the
structural motifs in 1OPF?
This protein has tertiary structure, where each subunit is a
large parallel beta barrel.
This protein has quaternary structure, where each subunit is a
large antiparallel beta barrel.
This protein has tertiary structure, where each subunit is a
large antiparallel beta barrel.
This protein has quaternary structure, where each subunit is a
large parallel beta barrel.
3. Given the information in the PDB entry for 1OPF,...
Which of the following is true of secondary structure in protein folding? Pick ALL that apply....
Which of the following is true of secondary structure in protein folding? Pick ALL that apply. A. It involves hydrogen bonding. B. It involves the side chains. C. It involves hydrophobic interactions. D. It results in alpha helicies with the side chains hidden inside the helix. E. It results in beta-pleated sheets with side chains sticking out of the plain of the sheet. F. It involves the peptide backbone.
In proteins, the hydrogen bonding responsible for the secondarystructure of a protein generally takes place...
In proteins, the hydrogen bonding responsible for the secondary
structure of a protein generally takes place between backbone
carbonyl oxygen atoms and amide hydrogen atoms. In contrast, the
hydrogen bonding that contributes to tertiary structure generally
occurs between amino acid side chains.Two serine residues are shown below, with possible hydrogen bonds
shown in green. Which bonds depict the hydrogen bonding that occurs
between serine residues and contributes to tertiary
structure?
Question 1 The protein in the diagram is (circle all that apply): Group of answer choices...
Question 1
The protein in the diagram is (circle all that apply):
Group of answer choices
a) a peripheral membrane protein
b) an integral membrane protein
c) a lipid anchored protein
Question 2
The protein shown in the diagram could potentially function as
(circle all that apply):
Group of answer choices
a) a receptor
b) a transmembrane anchor
c) a pore or channel
Question 3
The protein shown in the diagram has which of the following
(choose all that apply)?...
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on...
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on tRNA b. Ribosomes read RNA in the 5'+3' direction during protein synthesis c. STOP codons are degenerate d. DNA transcription produces mRNA in bacteria e. a, b, d f. a, d g. None of the above h. All of the above Which of the following destabilizes the tertiary structure of proteins? a. Hydrophobic (nonpolar) interactions b. Dipole moments between parallel alpha helices c. Van...
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to...
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to higher order Primary structure describes the order of amino acids in the peptide chain. Secondary structure describes the basic three-dimensional structures, a-helices and B sheets. Tertiary structure describes how the secondary structures come together to form an individual globular protein. Quatemary structure results from individual proteins coming together to form multi-subunit protein complexes Part A Complete the following vocabulary exercise relating to the level...
Explain why α-helices are most commonly observed in transmembrane protein sequences when the distance from one...
Explain why α-helices are most commonly observed in
transmembrane protein sequences when the distance from one side of
a membrane to the other can be spanned by significantly fewer amino
acids in a β-strand conformation.
Match the items in the left column to the appropriate blanks in
the sentences on the right.
prevents within a The structure of an a-helix promotes stretch of amino acids, and at the same time contiguous interactions with other important molecules involved in in the...
Explain why α-helices are most commonly observed in transmembrane protein sequences when the distance from one...
Explain why α-helices are most commonly observed in
transmembrane protein sequences when the distance from one side of
a membrane to the other can be spanned by significantly fewer amino
acids in a β-strand conformation.
Match the items in the left column to the appropriate blanks in
the sentences on the right.
noncontiguous The structure of an a-helix promotes within a stretch of amino acids, contiguous and at the same time interactions with other important molecules involved in in the...
2) At a pH greater than that of its isoelectric point, the structure of glycine is a) H-CH-COOH b) H-CH-C00- c) H-CH-CO e) H-CH-COO COOH b) H-CH-C00- c) H-CH-COOH d) H-CH-COO NH2 NH2 NH2 NH3 NH 3) Which of the following structures can be destroyed by the dena structures can be destroyed by the denaturation of a protein? a) Only primary and tertiary structures of a protein. b) Only secondary, tertiary y secondary, tertiary, and quaternary structures of a protein....
In most cases, mutations in the core of a protein that replace a
smaller nonpolar side chain in the wild-type (e.g., Ala, Val) with
a larger nonpolar side chain (e.g., Leu, Ile, Phe, Trp) in the
mutant, result in significant destabilization and misfolding of the
mutant. What feature of the protein core explains this observation?
Why would such a mutation prevent a protein from folding
properly?
Reset Help disulfide bridges small van der Waals contacts side chains in the protein...
1. Which of the following statements is consistent with the
structural motifs in 1OPF?
This protein has tertiary structure, where each subunit is a
large parallel beta barrel.
This protein has quaternary structure, where each subunit is a
large antiparallel beta barrel.
This protein has tertiary structure, where each subunit is a
large antiparallel beta barrel.
This protein has quaternary structure, where each subunit is a
large parallel beta barrel.
3. Given the information in the PDB entry for 1OPF,...
In proteins, the hydrogen bonding responsible for the secondary
structure of a protein generally takes place between backbone
carbonyl oxygen atoms and amide hydrogen atoms. In contrast, the
hydrogen bonding that contributes to tertiary structure generally
occurs between amino acid side chains.Two serine residues are shown below, with possible hydrogen bonds
shown in green. Which bonds depict the hydrogen bonding that occurs
between serine residues and contributes to tertiary
structure?
Question 1
The protein in the diagram is (circle all that apply):
Group of answer choices
a) a peripheral membrane protein
b) an integral membrane protein
c) a lipid anchored protein
Question 2
The protein shown in the diagram could potentially function as
(circle all that apply):
Group of answer choices
a) a receptor
b) a transmembrane anchor
c) a pore or channel
Question 3
The protein shown in the diagram has which of the following
(choose all that apply)?...
Which one of the following is true? a. tRNA synthetase loads the correct amino acid on tRNA b. Ribosomes read RNA in the 5'+3' direction during protein synthesis c. STOP codons are degenerate d. DNA transcription produces mRNA in bacteria e. a, b, d f. a, d g. None of the above h. All of the above Which of the following destabilizes the tertiary structure of proteins? a. Hydrophobic (nonpolar) interactions b. Dipole moments between parallel alpha helices c. Van...
Review| Constants| Periodic Table Protein structure is conceptually divided into four levels, from most basic to higher order Primary structure describes the order of amino acids in the peptide chain. Secondary structure describes the basic three-dimensional structures, a-helices and B sheets. Tertiary structure describes how the secondary structures come together to form an individual globular protein. Quatemary structure results from individual proteins coming together to form multi-subunit protein complexes Part A Complete the following vocabulary exercise relating to the level...
Explain why α-helices are most commonly observed in
transmembrane protein sequences when the distance from one side of
a membrane to the other can be spanned by significantly fewer amino
acids in a β-strand conformation.
Match the items in the left column to the appropriate blanks in
the sentences on the right.
prevents within a The structure of an a-helix promotes stretch of amino acids, and at the same time contiguous interactions with other important molecules involved in in the...
Explain why α-helices are most commonly observed in
transmembrane protein sequences when the distance from one side of
a membrane to the other can be spanned by significantly fewer amino
acids in a β-strand conformation.
Match the items in the left column to the appropriate blanks in
the sentences on the right.
noncontiguous The structure of an a-helix promotes within a stretch of amino acids, contiguous and at the same time interactions with other important molecules involved in in the...
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