Homework Answers
Question 10. "(b)" is the correct option. Hydrogen bonds are formed within the polypeptide chain in case of alpha helices while beta sheets are formed by linking two or more beta strands by hydrogen bonds. Specific amino acids are preferred in both the cases.
Question 11. "(a)" is the correct option. Protein domain can exist independent of the protein to which it is attached. It is independently stable, folded and functional.
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Question 10 (4 points) Although all protein structures are unique, there are common structural building blocks...
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...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held together by disulphide bridges/bonds. Alpha helices and beta sheets are common secondary protein structures. Tertiary protein structures are held together by covalent bonds only. Secondary protein structures are held together by hydrogen bonds only. All proteins have a quaternary protein structure. Amino acids linked with a peptide bond make up the primary protein structure.
QUESTION 7 Which of the following does not cause a protein to denature? O A heat...
QUESTION 7 Which of the following does not cause a protein to denature? O A heat 0 B. pH o detergent D. None of the above QUESTION 8 Repeating structural motifs, which make up secondary structures, such a alpha helices and beta sheets, are predominantly formed as a result of A hydrophobic interactions B. peptide bonds oC electrostatic interactions D. intramolecular hydrogen bonding QUESTION 9 Hydrophobic interactions could occur be Avaine and a nine B. aspartate and argnine C glutamine...
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)?...
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)...
After going through all the activities, conclude your write up by addressing these two questions. A)interactions...
After going through all the activities, conclude your write up by addressing these two questions. A)interactions between what parts of the polypeptide chain are the most important for defining secondary structure? B) Do you think that all amino acid sequences would have the same propensity for forming helices and/or sheets? Why/why not? Activity 1:Thinking about Phi and Psi angles Make a four-residue peptide and switch atom numbering on. Can you identify the N-and C-termini? Activity 2–Playing with alpha-helices After resetting,...
Proteins are polymers of amino acids that can exist in ordered structures stabilized by a variety...
Proteins are polymers of amino acids that can exist in ordered structures stabilized by a variety of molecular interactions. However, when certain conditions are changed, the compact structure of a polypeptide chain may collapse into a random coil. This structural change may be regarded as a phase transition occurring at a characteristic transition temperature, the melting temperature, Tm, which increases with the strength and number of intermolecular interactions in the chain. A thermodynamic treatment allows predictions to be made of...
9. (12 points) Spectrin is a cytoskeletal protein that lines the intracellular side of the plasma...
9. (12 points) Spectrin is a cytoskeletal protein that lines the intracellular side of the plasma membrane in eukaryotic cells. Two subunits, spectrin alpha and spectrin beta, will dimerize to form heterodimers; these heterodimers will assemble into hexagonal or pentagonal structures to provide mechanical support for the membrane bilayer. (For this problem, we are primarily interested in the human alpha chain. Make a note of any assumptions if you are unsure of your answer.) a. What is the structural classification/domain...
please help me type my introduction for my lab report. thank you!! INTRODUCTION In this section,...
please help me type my
introduction for my lab report. thank you!!
INTRODUCTION In this section, you will introduce the experiment by explaining generally what you did and why you did it. This section usually starts with an examination of the literature through a library search to inform the reader about work already done on this topic. If you have never done a bibliographic database search for scientific journal articles, then you are not yet a biological sciences major (note:...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
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...
QUESTION 2 Select the CORRECT statements (chose all that are correct). Secondary protein structures are held together by disulphide bridges/bonds. Alpha helices and beta sheets are common secondary protein structures. Tertiary protein structures are held together by covalent bonds only. Secondary protein structures are held together by hydrogen bonds only. All proteins have a quaternary protein structure. Amino acids linked with a peptide bond make up the primary protein structure.
QUESTION 7 Which of the following does not cause a protein to denature? O A heat 0 B. pH o detergent D. None of the above QUESTION 8 Repeating structural motifs, which make up secondary structures, such a alpha helices and beta sheets, are predominantly formed as a result of A hydrophobic interactions B. peptide bonds oC electrostatic interactions D. intramolecular hydrogen bonding QUESTION 9 Hydrophobic interactions could occur be Avaine and a nine B. aspartate and argnine C glutamine...
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)?...
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)...
Proteins are polymers of amino acids that can exist in ordered structures stabilized by a variety of molecular interactions. However, when certain conditions are changed, the compact structure of a polypeptide chain may collapse into a random coil. This structural change may be regarded as a phase transition occurring at a characteristic transition temperature, the melting temperature, Tm, which increases with the strength and number of intermolecular interactions in the chain. A thermodynamic treatment allows predictions to be made of...
9. (12 points) Spectrin is a cytoskeletal protein that lines the intracellular side of the plasma membrane in eukaryotic cells. Two subunits, spectrin alpha and spectrin beta, will dimerize to form heterodimers; these heterodimers will assemble into hexagonal or pentagonal structures to provide mechanical support for the membrane bilayer. (For this problem, we are primarily interested in the human alpha chain. Make a note of any assumptions if you are unsure of your answer.) a. What is the structural classification/domain...
please help me type my
introduction for my lab report. thank you!!
INTRODUCTION In this section, you will introduce the experiment by explaining generally what you did and why you did it. This section usually starts with an examination of the literature through a library search to inform the reader about work already done on this topic. If you have never done a bibliographic database search for scientific journal articles, then you are not yet a biological sciences major (note:...
29. Which of the following would be synthesized in and processed by the smooth endoplasmic reticulum and Golgi apparatus? A. lipids and steroids B. DNA polymerase and RNA polymerase C. lysosomal enzymes D. cytoskeletal proteins 30. Which of the following are processed in the Golgi apparatus? A. integral membrane proteins of the plasma membrane B. proteins that are secreted from the cell C. proteins that will be broken down by lysosomes D. all of the above E. none of the...
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