EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 51.2, Problem 1R
Summary Introduction
To review:
The fate of ammonia (formed when amino acids are broken down) in body of a fish and in body of a mammal.
Introduction:
Ammonia is the waste product that is to be removed from the body and since, it is very toxic it cannot be stored in the body of organism and diffusion has to be rapid and continuous. Ammonia is synthesized in all the organisms as nitrogenous wastes. It is formed when amino acids are broken down in the body.
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The image below shows an amino acid at physiological pH. Answer the following questions about
this amino acid.
H
|
//
- c
H3N*
|
CH2
CH2
|
H2N
a. How many carbons are in this amino acid's side chain? Entry Format: please type your answer as a
number. 3
b. Is the side chain of this amino acid ionized at physiological pH? Entry Format: Please type the
word yes or no without any capitalization. yes
c. At physiological pH, amino acids have two ionic charges, one positively charged group and one
negatively charged group. What is the term for this sort of molecule? Entry Format: Please type your
response with all lowercase letters.
Shown below are three amino acids:
H.
H.
H--CH,CH,CH, -N.
NH,
H- CHCH,
NH,
Hn,-SH
NH,
ARGININE
ISOLEUCINE
(ile)
CYSTEINE
(arg)
(cys)
Answer the following questions (12-16).
Give two examples of amino acids that are:
Acidic
Basic
Polar
Nonpolar
Chapter 51 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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