Which of the following statements differentiates structurally albumin (a globular protein) structurallywith that of collagen (fibrous protein)?O Peptide bonds in collagen are rigid and fixed, while the peptide bonds in albumin can freely rotateO Collagen possess an elongated shape while albumin resemble a spherical shapeThe amino acids in albumin are in the L-form while the amino acids in collagen are in the D-formAlbumin possess less diverse set of amino acids while collagen can contain a variety of amino acid types

Macromolecules are the higher molecular mass compounds. The macromolecules of living systems are…

Answered: Which of the following statements…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Peptide bonds are the last bonds to break when collagen proteins are denatured Select one: of O True O False Estion
Collagen consists of three helices with carbon backbones that are tightly wrapped around one another in a "triple helix." Which of these amino acids is most likely to be found in the highest concentration in collagen? 5 Threonine Glycine Proline Cysteine
Which of the following best describes collagen? Select the correct responses): It is a sinistral super helix that is formed from three sinistral helices. It is a sinistral super helix that is formed from three dextral helices. • It is primarily made up of chiral and cyclic amino acids. It is primarily made up of chiral and acyclic amino acids. It is a dextral super helix that is formed from three sinistral helices. • It is primarily made up of achiral and cyclic amino acids. ]It is primarily made up of achiral and acyclic amino acids. • It is a dextral super helix that is formed from three dextral helices.
All of the following are filamentous proteins EXCEPT
What scientific discoveries and scientific contributions was G.N. Ramachandran best known for? elucidating the primary, secondary, and tertiary triple helical structure of the protein collagen determining the structure of the alpha helix creating the "Ramachandran plot" inventing and creating the first computerized tomography machines
Which statement is false? ○ Each chain of collagen adopts a right-handed helix ○ Disulfide linkages modulate the properties of keratin structure. O Modified lysine residues can enhance collagen's durability Silk resists stretching because of its ẞ conformation ○ The polypeptides in a-keratin are mainly in the a-helical conformation
Collagen is composed of the collagen triple helix containing 1042 amino acids, How long is the collagen triple helix in Angstroms?
A lipid bilayer was prepared from equal amounts of the following lipids: • 1-lauryl-2-palmitoylphosphatidylcholine • 1-myristoyl-2-linoleoylphosphatidylcholine Adding cholesterol to the lipid bilayer prepared above will most likely O decrease bilayer fluidity O increase bilayer fluidity have no effect on bilayer fluidity O destroy the bilayer
Which of the following is incorrect about the collagen structure? a. The covalent cross-links between the individual chains stabilize the collagen structure b. None; all the other choices are correct The helical structure is cross-linked (with covalent bonds) at both ends Od. Gly residues are all located in the center of the helix (i.e. between the individual chains) C.
Both alpha keratin and collagen are fibrous proteins. However, the hydrogen bonding pattern is different between the helices of the respective proteins. What is the major difference?
Which of the following membrane lipids is mainly structural? Phosphatidylthanolamine All of the other answers are correct Phosphatidylcholine Spingomyelin Inositol phospholipids
For the lipids within the bilayer that comprise the plasma membrane: O The hydrophilic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells, with hydrophobic ends buried in the center of the lipid bilayer. The hydrophobic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells, with hydrophilic ends buried in the center of the lipid bilayer. The hydrophilic ends face the outside (extracellular/exoplasmic face) of the cells and the hydrophobic ends face inside (cytoplasmic face) of the cells. O Hydrophobic and hydrophilic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells randomly. The hydrophobic ends face the outside (extracellular/exoplasmic face) of the cells, the hydrophilic ends face inside (cytoplasmic face) of the cells.

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