Answered: In what important ways do the α helix…

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter21: Dna, Genes, And Biotechnology

Section: Chapter Questions

Problem 3RQ

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Similar questions

A sequence of amino acids in a certain protein is found to be -Ser-Gly-Pro-Gly-. The sequence is most probably part of a(n): A) parallel β sheet. B) α sheet. C) β turn. D) α helix. E) antiparallel β sheet.
a) (i) Give THREE (3) amino acids that most likely can be located in the part of the trans- membrane protein that lies within the cell membrane. Explain why. (ii)Give THREE (3) amino acids that most likely can be located in the part of the transmembrane protein that lies outside the cell membrane. Explain why.
Q) a) A protein gains a mutation of a surface exposed residue. The mutation is Arg --> Leu. Based on the sequence of the protein when it folds the Leu remains on the surface of the protein. What is the change in chemical characteristic of the amino acid caused by this mutation? b) Briefly explain any entropic consequences of this mutation. (2 sentences MAX) c) What might happen in order to overcome these entropic consequences and how would that affect the cell? (1-2 sentences)
Consider the following in light of the concept of levels of structure (primary, secondary, tertiary, quaternary)as defined for proteins.(a) What level is shown by double-stranded DNA?(b) What level is shown by tRNA?(c) What level is shown by mRNA?
What amino acids do the following sequences code for?(a) AUC (b) GCU (c) CGA (d) AAG
Consider the following in light of the concept of levels of structure (primary, secondary, tertiary, quaternary) as defined for proteins. (a) What level is shown by doublestranded DNA? (b) What level is shown by tRNA? (c) What level is shown by mRNA?
Present the Two different representations for the triple helix of collagen ?
Draw the structure of each nucleotide: (a) UMP; (b) dTMP; (c) AMP.
Suppose that a DNA segment has the following nucleotide sequence: CTC ATA CGA TTC AAG TTA. Which of the following nucleotide sequences would be found in a complementary mRNA strand? (a) GAG UAU GAU AAC UUG AAU. (b) GAG TAT GCT AAG TTC AAT. (c) GAG UAU GCU AAG UUC AAU. (d) GUG UAU GGA UUG AAC GGU.
What are the functions of thesurprisingly large amount of unfoldedpolypeptide chain found in proteins?
Currently, aspartic acid is forming an ionic interaction with arginine in a protein. Part a) If arginine is replaced with glutamic acid, would the ionic interaction have its stability increased, decreased, or have no effect on the ionic interaction? Part b) If arginine is replaced with Lysine, would the ionic interaction have its stability increased, decreased, or have no effect on the ionic interaction? Part c) If arginine is replaced with isoleucine, would the ionic interaction have its stability increased, decreased, or have no effect on the ionic interaction?
Lamin polypeptides (nuclear lamina) form dimers in which the central α-helical regions of two polypeptide chains are wound around each other. This is called a coiled coil. a) True b) False

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In what important ways do the α helix and β sheet structures differ? (b) How are they similar?