Homework Answers
The Ph change alters the charges on amino acid side chains , which break ionic bonds, leading to change in the structure of the protein, which significantly change the electrostatic energies affecting the polypeptide chain and it will change the primary structure of the protein not the secondary structure of the protein.(as by the effect of this interactions between the atoms of the backbone is not changed).
Hence it will only change the primary structure of the protein.
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Part A When a protein enters the low pH environment of the stomach, charges on amino...
QUESTION 7 Salivary amylase acts in the mouth where the pH is -7 but it becomes...
QUESTION 7 Salivary amylase acts in the mouth where the pH is -7 but it becomes inactivated in the stomach after a meal where the pH is -1. Why does a decrease in pH from about pH 7 to pH 1 result in the salivary amylase protein becoming inactive? O lonisable amino acid side chains of the salivary amylase protein will be protonated, thereby disrupting the normal intra-protein hydrogen bonds, resulting in unfolding (denaturing) of the salivary amylase protein. The...
please answer! 3) Protein structure and amino acid side chains a) Give examples of the types...
please answer!
3) Protein structure and amino acid side chains a) Give examples of the types if attractive forces found between the side chains of the following amino acid residue pairs at pH 7.4 00 Leu and Phe (ii) Two Cys (ii) Asp and Thr (iv) Asp and Arg b) Of the 4 levels of protein structure, which ones are stabilized by interactions between amino acid side chains? c) Identify the two regular types of secondary structures and describe the...
4.) The enzyme, pepsin, is one that hudrolvess proteins in the stomach, where the pH Is...
4.) The enzyme, pepsin, is one that hudrolvess proteins in the stomach, where the pH Is aboun 2 due to stomach acidx, into individual amino acids a) What would you expect to happen so the activity of the enzyme pepsin when in exits the stomach and enters the small imestine where the pi is about ? b.) Amylase is found in saliva where hydrolysis of starches begins. What would you expeet to happen to the activity of the enryme amylase...
Which of the following statements about protein structure is NOT correct? Why are proteins able to...
Which of the following statements about protein structure is NOT correct? Why are proteins able to buffer physiologic solutions over a wide range of pH? They contain many functional groups with different pK's They are macromolecules of high molecular weight They have many peptide bonds which are very resistant to hydrolysis by hydrogen or hydroxyl ions They have considerable secondary and tertiary structure which cause hydrogen ions to be sequestered The side chains of the amino acids with acidic functional...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
Please explain, Thanks! The following image shows the 20 amino acids found in proteins. OH CH...
Please explain, Thanks!
The following image shows the 20 amino acids found in proteins. OH CH H HNCOOH Glycine HN HẠN CHO Alanine HẠN COOH Serine н соон Threonine Cysteine HAN COOHHN COOH Nлсоон н соон Methionine Valine Leucine Isoleucine Proline OOH MNCOOHHN COOH HN COOH H COOH HẠNỐIOOH Apartic Acid Phenylalanine Tyrosine Tryptophan Glutamic Acid HNCOOHH COOH Asparagine Glutamine HNCOOHNCOOH Histidine Lysine н соон Arginine Imagine that in a protein, a lysine amino acid is replaced with an isoleucine....
When you drink a cup of milk, what happens to the protein in the milk after...
When you drink a cup of milk, what happens to the
protein in the milk after it has been swallowed? To describe these
processes, you must be able to use the vocabulary
effectively.
FILL IN THE BLANKS
tripeptide is the active form of a digestive enzyme in the stomach that breaks polypeptide chains into smaller acid group polypeptides. dipeptide 2. Cleavage of proteins by pepsin in the stomach results in formation of which get broken down amino acids further in...
6) Proteins are composed of amino acids polymerized into long chains. The structure of a protein...
6) Proteins are composed of amino acids polymerized into long chains. The structure of a protein - that is, its overall shape and how the chains are "folded” around each other - is very important for its function. In an aqueous environment, in an active, folded state the hydrophilic amino acids in the protein are facing outwards exposed to the water and the hydrophobic amino acids are hidden away from the water in the core of the protein. In a...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysi...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysine B) It is polar C) Forms disulfide bond/ cysteine D) Forms hydrogen bonds with neighbors/ alanine serine 27. All amino acids found in proteins are L-amino acids EXCEPT the achiral. A) glutamate B) Lysine C) glyeine D) Alamine 28. The plH at which the positive and negative charges of an amino acid balance each ofher is called the A) isotonic...
20. Protein amino acid side chains can hydrogen bond in the major groove of DNA, and...
20. Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs. In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition? A) Ala, Asn, Glu B) Arg. Gin, Leu C) Asn, Gin, Trp D) Asn, Glu, Lys E) Glu, Lys, Pro 21. Compared with DNA polymerase, reverse transcriptase: A) does not require a primer to...
QUESTION 7 Salivary amylase acts in the mouth where the pH is -7 but it becomes inactivated in the stomach after a meal where the pH is -1. Why does a decrease in pH from about pH 7 to pH 1 result in the salivary amylase protein becoming inactive? O lonisable amino acid side chains of the salivary amylase protein will be protonated, thereby disrupting the normal intra-protein hydrogen bonds, resulting in unfolding (denaturing) of the salivary amylase protein. The...
please answer!
3) Protein structure and amino acid side chains a) Give examples of the types if attractive forces found between the side chains of the following amino acid residue pairs at pH 7.4 00 Leu and Phe (ii) Two Cys (ii) Asp and Thr (iv) Asp and Arg b) Of the 4 levels of protein structure, which ones are stabilized by interactions between amino acid side chains? c) Identify the two regular types of secondary structures and describe the...
4.) The enzyme, pepsin, is one that hudrolvess proteins in the stomach, where the pH Is aboun 2 due to stomach acidx, into individual amino acids a) What would you expect to happen so the activity of the enzyme pepsin when in exits the stomach and enters the small imestine where the pi is about ? b.) Amylase is found in saliva where hydrolysis of starches begins. What would you expeet to happen to the activity of the enryme amylase...
Which of the following statements about protein structure is NOT correct? Why are proteins able to buffer physiologic solutions over a wide range of pH? They contain many functional groups with different pK's They are macromolecules of high molecular weight They have many peptide bonds which are very resistant to hydrolysis by hydrogen or hydroxyl ions They have considerable secondary and tertiary structure which cause hydrogen ions to be sequestered The side chains of the amino acids with acidic functional...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
Please explain, Thanks!
The following image shows the 20 amino acids found in proteins. OH CH H HNCOOH Glycine HN HẠN CHO Alanine HẠN COOH Serine н соон Threonine Cysteine HAN COOHHN COOH Nлсоон н соон Methionine Valine Leucine Isoleucine Proline OOH MNCOOHHN COOH HN COOH H COOH HẠNỐIOOH Apartic Acid Phenylalanine Tyrosine Tryptophan Glutamic Acid HNCOOHH COOH Asparagine Glutamine HNCOOHNCOOH Histidine Lysine н соон Arginine Imagine that in a protein, a lysine amino acid is replaced with an isoleucine....
When you drink a cup of milk, what happens to the
protein in the milk after it has been swallowed? To describe these
processes, you must be able to use the vocabulary
effectively.
FILL IN THE BLANKS
tripeptide is the active form of a digestive enzyme in the stomach that breaks polypeptide chains into smaller acid group polypeptides. dipeptide 2. Cleavage of proteins by pepsin in the stomach results in formation of which get broken down amino acids further in...
6) Proteins are composed of amino acids polymerized into long chains. The structure of a protein - that is, its overall shape and how the chains are "folded” around each other - is very important for its function. In an aqueous environment, in an active, folded state the hydrophilic amino acids in the protein are facing outwards exposed to the water and the hydrophobic amino acids are hidden away from the water in the core of the protein. In a...
26. Which of the following classification does not match the amino acid side chain A) Contains an basic group/ lysine B) It is polar C) Forms disulfide bond/ cysteine D) Forms hydrogen bonds with neighbors/ alanine serine 27. All amino acids found in proteins are L-amino acids EXCEPT the achiral. A) glutamate B) Lysine C) glyeine D) Alamine 28. The plH at which the positive and negative charges of an amino acid balance each ofher is called the A) isotonic...
20. Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs. In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition? A) Ala, Asn, Glu B) Arg. Gin, Leu C) Asn, Gin, Trp D) Asn, Glu, Lys E) Glu, Lys, Pro 21. Compared with DNA polymerase, reverse transcriptase: A) does not require a primer to...
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