Determine whether the sentences are true or false 27-( ) The only acidic amino acid is...
Determine whether the sentences are true or false
27-( ) The only acidic amino acid is aspartic acid.
36-( ) The quaternary structure is physically very strong because many polypeptides are clustered together.
37-( ) The amino acid sequence consisting of I-V-V-F-V is judged to form a β strand.
38-( ) The amino acid sequence consisting of A-E-A-E-L-A-L-E is judged to form an α-helix.
39-( ) If the molecular weight of glycine is 75, the molecular weight of the peptide in which 6 glycines are linked is about 360.
40-( ) Covalent bonds are not included in the factor of formation of tertiary structure.
41-( ) Covalent bonds are not included in the factor of formation of quaternary structure.
42-( ) The hydrogen bond is not involved in the formation of the α-helix structure.
43-( ) The ionic bond of the protein tertiary structure has stronger binding force than the disulfide bond.
44-( ) The oligomer structure of the protein is a structure containing a carbohydrate.
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Determine whether the sentences are true or false
27-( ) The only acidic amino acid is...
which of the following is not a way in which amino acid structure in sequence might...
which of the following is not a way in which amino acid structure in sequence might affect the properties of a protein a) Amino acid side chains form peptide bonds with each other causing the molecule to twist into a secondary structure b) Amino side chains interact with each other causing polypeptides to bend into a tertiary structure c) Hydrogen bonding between every fourth amino acid results in the formation of a coil called an a helix d) Hydrogen bonding...
6.) Provide short answers for the questions about protein structure below: a.) True or False, amino...
6.) Provide short answers for the questions about protein structure below: a.) True or False, amino acid sequence defines the native structure of protein. b.) What is the main type of bonding responsible for stabilizing the secondary structure of proteins? c.) Briefly discuss the thermodynamics of protein folding into its native 3D structure. Is this process enthalpy driven or entropy driven? d.) Give an example of 2 major secondary structural motifs found in polypeptides. Do any of these motifs appear...
6. (a) Show the arrangement of the groups on the a carbon of the naturally occurring amino acids (draw out the stereoce...
6. (a) Show the arrangement of the groups on the a carbon of the naturally occurring amino acids (draw out the stereocentre). (b) What is the significance of chirality in the biological world? 7. (a) Sh (a) Show the repeating unit of the polypeptide chain in a protein and indicate the peptide bond. (b) What are the following structures of a protein (i) primary, (ii) secondary, (iii) tertiary and (iv) quaternary. 1. Polypeptides are the natural polymer of the naturally...
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...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys,...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
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...
added part a of the question for clarity 1. Polypeptides are the natural polymer of the...
added part a of the question for clarity
1. Polypeptides are the natural polymer of the naturally occurring amino acids. Their structure can be considered at various levels to consist of Primary: amino acid sequence secondary: regions of ordered structure (a-helix, B-sheet, etc.) tertiary: overall 3D shape; folding quarterniary: interaction of protein sub-units (a) Consider the following segment of a polyamide H Show the resonance structures for the amide bond (in the box) (i) (ii) Indicate what o and w...
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to...
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to the 3' end of the mRNA molecule? A. Peptide bond B.5 phosphate group C.3" hydroxyl group D. Amino (N-terminus) E. Carboxyl (C-terminus) QUESTION 14 Which of the following is true regarding pre-mRNA modifications/processing? O A. Alternative splicing allows for increased complexity and synthesis of protein isomers OB. The 5' cap is added after RNA polymerase dissociates from the gene OC. The poly A tail...
(18 pts) Answer True or False for each of the following questions (a) An amino acid...
(18 pts) Answer True or False for each of the following questions (a) An amino acid is in the zwitterionic form only if the pll is well below 7 (b) Salting out takes advantage of the fact that the solubility of proteins varies with concentration. (c) Proteins usually consists of amino acids of both L-isomers (d) Essentially all a-helices found in proteins are left-handed globular protein is thermodynamically the most stable structure. ( Isoclectric focusing can be used to separate...
las n o relationship with the tertiary structure. nuclease proves that the primary structure of a...
las n o relationship with the tertiary structure. nuclease proves that the primary structure of a globular the he d) The planes of base pairs using ribo e) Th rs are parallel to the helix axis in the Watson-Crick DNA double helix. e sequence on one strand of n Crick DNA doubld e the helix varies independenty of that in the other strand in the varies in 10. The person n that discovered that A:T and G:C ratios in DNA...
6. (a) Show the arrangement of the groups on the a carbon of the naturally occurring amino acids (draw out the stereocentre). (b) What is the significance of chirality in the biological world? 7. (a) Sh (a) Show the repeating unit of the polypeptide chain in a protein and indicate the peptide bond. (b) What are the following structures of a protein (i) primary, (ii) secondary, (iii) tertiary and (iv) quaternary. 1. Polypeptides are the natural polymer of the naturally...
5. Which of the following molecules form complex structures linked by covalent bonds through Lys, HyLys, or His residues? A) Collagen B) Alpha keratin C) Hemoglobin D) Myoglobin E) Beta barrels 6. Which of the following correlates to the classic experiment demonstrating that reduced and denatured RNase A could refold into the native form? A) Disulfide bonds do not stabilize folded proteins B) Reducing agents denature proteins C) 1° structure can determine 3° structure D) Urea cleaves disulfide bonds E)...
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...
added part a of the question for clarity
1. Polypeptides are the natural polymer of the naturally occurring amino acids. Their structure can be considered at various levels to consist of Primary: amino acid sequence secondary: regions of ordered structure (a-helix, B-sheet, etc.) tertiary: overall 3D shape; folding quarterniary: interaction of protein sub-units (a) Consider the following segment of a polyamide H Show the resonance structures for the amide bond (in the box) (i) (ii) Indicate what o and w...
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to the 3' end of the mRNA molecule? A. Peptide bond B.5 phosphate group C.3" hydroxyl group D. Amino (N-terminus) E. Carboxyl (C-terminus) QUESTION 14 Which of the following is true regarding pre-mRNA modifications/processing? O A. Alternative splicing allows for increased complexity and synthesis of protein isomers OB. The 5' cap is added after RNA polymerase dissociates from the gene OC. The poly A tail...
(18 pts) Answer True or False for each of the following questions (a) An amino acid is in the zwitterionic form only if the pll is well below 7 (b) Salting out takes advantage of the fact that the solubility of proteins varies with concentration. (c) Proteins usually consists of amino acids of both L-isomers (d) Essentially all a-helices found in proteins are left-handed globular protein is thermodynamically the most stable structure. ( Isoclectric focusing can be used to separate...
las n o relationship with the tertiary structure. nuclease proves that the primary structure of a globular the he d) The planes of base pairs using ribo e) Th rs are parallel to the helix axis in the Watson-Crick DNA double helix. e sequence on one strand of n Crick DNA doubld e the helix varies independenty of that in the other strand in the varies in 10. The person n that discovered that A:T and G:C ratios in DNA...
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