Biology: How Life Works
3rd Edition
ISBN: 9781319017637
Author: James Morris, Daniel Hartl, Andrew Knoll, Melissa Michael, Robert Lue, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: Macmillan Higher Education
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Chapter 35.2, Problem 10SAQ
Summary Introduction
To determine:
The two mechanisms by which the force of contraction can be increased in the vertebrate muscles.
Concept introduction:
Muscles are the contracting and relaxing units of the muscular system. The muscles are responsible for the movement. The brain along with spinal cord controls each and every movement in the human body. The nerve cells are responsible for the muscle movement. The muscle fiber responds to the stimulus provided by the motor neuron by the secretion of neurotransmitters. The muscle contracts by receiving the electrical impulse.
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Glu-His-Trp-Ser-Gly-Leu-Arg-Pro-Gly
The pKa values for the peptide's side chains, terminal amino groups, and carboxyl groups are provided in the table.
Amino acid Amino pKa Carboxyl pKa Side-chain pKa
glutamate
9.60
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histidine
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tryptophan
9.39
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serine
9.15
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glycine
9.60
2.34
leucine
9.60
2.36
arginine
9.04
2.17
12.48
proline
10.96
1.99
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net charge at pH 3:
Calculate the net charge of the molecule at pH 8.
net charge at pH 8:
Calculate the net charge of the molecule at pH 11.
net charge at pH 11:
Estimate the isoelectric point (pl) for this peptide.
pl:
Biology Question
This entire structure (Pinus pollen cone) using lifecycle terminology is called what?
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