Homework Answers
Here, Threonine and Glutamine are "polar amino acids " which will be found in outer hydrophilic region of folded protein.
But Isoleucine is non-polar amino acid which can be found in Inner hydrophobic region of folded protein.
Hence, correct option is : (A) Isoleucine
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4. Shown below is a segment from a polypeptide chain. Which amino acid in this segment...
See the side chain of the amino acid isoleucine on page 113 of your textbook. This...
See the side chain of the amino acid isoleucine on page 113 of your textbook. This side chain contains three methyl groups. In a folded protein in aqueous solution, an isoleucine residue is most likely to be found A. On the surface of the protein, forming hydrogen bonds with water molecules B. On the surface of the protein, paired with another amino acid in an ionic bond C. In the interior of the protein, hydrogen bonded to other groups D....
The pK of the side chain of amino acid X in a polypeptide is normally in...
The pK of the side chain of amino acid X in a polypeptide is normally in the range of 9-10 and carries a positive charge when protonated. Suppose you have a soluble globular protein and you find there is an X that has a pK of 6.5. What is the most likely reason for such a large drop in pK? Circle the correct answer. a) X is on the surface of the protein where it ion pairs with the carboxylate...
Amino Acid Examples The following amino acid is proline. Which of the following best describes the...
Amino Acid Examples The following amino acid is proline. Which of the following best describes the properties its side chain has as part of a protein? ОН A) Acidic B) Basic C) Hydrophobic D) Hydrophilic E) Special role ZI only AA that is a 2º amine
An amino acid is considered essential because cells lack the ability to synthesize them. (true or...
An amino acid is considered essential because cells lack the ability to synthesize them. (true or false)? Which amino acid is most likely to be found on the interior of a globular protein? 1.Serine 2.Glutamic acid 3.Threonine 4.Asparagine 5.Leucine Which amino acid is likely to be found on the exterior of a globular protein? 1.Leucine 2.Phenylalanine 3.Alanine 4.Tryptophan 5. Serine Competitive inhibitors bind an enzymes active site and are reversible. True or False?
options There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The...
options
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH3 NHE ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal...
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH₃ NH₃ Air ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
1. Amino acids are considered to be either hydrophobic or hydrophilic as described by the relative...
1. Amino acids are considered to be either hydrophobic or hydrophilic as described by the relative polarity of their side chain. Consider a folded protein in an aqueous environment; where would the hydrophobic amino acids likely be found? -Tucked away in the middle of the folded protein -Randomly distributed throughout the protein -Exposed on the exterior surface of the folded protein 2. All proteins exhibit a primary, secondary, and tertiary structure, but not all proteins exhibit a quaternary structure. Describe...
Amino Acid Examples The following amino acid is aspartic acid. Which of the following best describes...
Amino Acid Examples The following amino acid is aspartic acid. Which of the following best describes the properties its side chain has as part of a protein? A) Acidic он B) Basic C) Hydrophobic D) Hydrophilic H2N E) Special role ОН
THIS IS BIOCHEMISTRY A peptide has a low pI value. Which of the following amino acids...
THIS IS BIOCHEMISTRY A peptide has a low pI value. Which of the following amino acids are likely to be present? Glycine Serine Valine Aspartic aci Arginine The R-groups of which of the following pairs of amino acids could participate in the formation of salt bridge electrostatic interaction? Alanine and valine Valine and lysine Lysine and glutamate Serine and isoleucine Asparagine and glutamine Which of the following interactions does NOT contribute to stabilizing tertiary structure? Hydrophobic interactions Electrostatic interations...
3. Suppose the polypeptide below (where each circle represents an amino acid residue) was to form...
3. Suppose the polypeptide below (where each circle represents an amino acid residue) was to form a folded structure stabilized primarily by a disulfide linkage. a. Draw the folded structure (using circles) and illustrate the disulfide bond. Asp Met LeuCys Gly GlyY Val IleTyrXSerVal CysPhe b. What level of protein structure is being illustrated in the folded forrm? Primary, secondary, tertiary, or quaternary? c. What other type of intramolecular interaction might stabilize the folded form of this polypeptide? 4. The...
Amino Acid Examples The following amino acid is proline. Which of the following best describes the properties its side chain has as part of a protein? ОН A) Acidic B) Basic C) Hydrophobic D) Hydrophilic E) Special role ZI only AA that is a 2º amine
options
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH3 NHE ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
There are peptide bonds in the molecule below. The N-terminal amino acid is Choose... The C-terminal amino acid is Choose... V NH₃ NH₃ Air ОН 90- NH Choose... glycine alanine valine leucine isoleucine serine threonine cysteine methonine aspartate glutamate asparagine glutamine lysine arginine phenylalanine tyrosine proline histidine
Amino Acid Examples The following amino acid is aspartic acid. Which of the following best describes the properties its side chain has as part of a protein? A) Acidic он B) Basic C) Hydrophobic D) Hydrophilic H2N E) Special role ОН
3. Suppose the polypeptide below (where each circle represents an amino acid residue) was to form a folded structure stabilized primarily by a disulfide linkage. a. Draw the folded structure (using circles) and illustrate the disulfide bond. Asp Met LeuCys Gly GlyY Val IleTyrXSerVal CysPhe b. What level of protein structure is being illustrated in the folded forrm? Primary, secondary, tertiary, or quaternary? c. What other type of intramolecular interaction might stabilize the folded form of this polypeptide? 4. The...
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