10. Which of the following statements is FALSE about proteins?A) The sequence of the atoms in the polypeptide backbone does not vary between differentproteins.BYProteins would fold to the most stable conformation with the lowest energy level.C) Misfolded protein can be sent to the proteosome where they will be folded into the correctconformation.DY The three-dimensional structure of a protein is in general determined by the sequence ofthe amino acids.E) Proteins are linear polymers built of amino acids.

Proteins are composed of twenty standard amino acids attached together via peptide bonds. These…

Answered: 10. 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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6. A control phospholipid membrane is isolated in which the phospholipid tails all have an 18-C chain length and are comprised of a 50:50 mixture of saturated and unsaturated tails. In addition, about 25% of the lipids are fluorescently labeled on the head groups. a) Draw a single plot of Fluidity vs. Temperature that contains the expected curves for: Control phospholipid (line- -) Control supplemented with 18-C saturated phospholipids (dashed line - Control supplemented with 16-C chain length (dotted line • • • • • • ) b) Draw a single plot of the Fluorescence Intensity vs. Time that contains the expected curves of a Fluorescence Recovery After Photobleaching (FRAP) using the same samples as in (a) above. The FRAP experiment is conducted at the same temperature for each sample (which is the Tm of the of the control phospholipid).
None
17. Protein folding results in a large decrease in entropy since a polypeptide is now constrained and more ordered. However, what counterbalances the loss of entropy associated with protein folding?
1. Theoretically, a protein could assume a virtually infinite number of configurations and conformations. Suggestseveral features of proteins that drastically limit the actual number. 2. What are the greatest structural features that differentiate sphingolipids from phosphoglycerides? 3. High levels of glucose-6-phosphate inhibit glycolysis. If the concentration of glucose-6-phosphate decreases,activity is restored. Why?
30.What protein structure is composed of a sequence of amino acids? Group of answer choices tertiary secondary quaternary primary
Select two molecules that could be found in a protein, and from the two molecules, are they lower or higher numbered amino acids and would they be acidic, basic, polar, or nonpolar?
2. 3. Where in your cell can you find the instructions for how to make all of the proteins?*
Draw beta sheet with backbone hydrogen bonds, is this structure on the interior or exterior of the protein and why? Region 1: -Ser-Thr-Glu-His- Region 2: -Asp-Tyr-Lys-Asn
3. The figure below depicts a protein folding into its final shape. If this was a cytoplasmic protein: goa oog ge Tertiary Structure a. The chemical properties of the amino acids in black are likely (circle): Polar or Nonpolar Primary Structure b. The chemical properties of the amino acids in white are likely (circle): Polar or Nonpolar
3. Which best describes the contribution of tertiary (3’) structure of to the native conformation of polypeptides and proteins: a) Structure that results from intrachain interactions of amino acid side chains b) Structure that results from interchain interactions of amino acid side chains c) Structure that results from base pairing d) Structure that results from the linear sequence of amino acids from beginning to end of molecule
1. Draw an annotated diagram to illustrate the four levels of protein structure
……….. proteins do not have a defined secondary structure composition. They can have both helices and sheets. When primary sequence is studied, it does not look like there is any order in the sequence, but there is order in 3D structure. ……… amino acids are clustered in the core of the protein, away from the solvent (water molecules) and …….. amino acids are on the surface of the protein.

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