2 Question 2 of 11Which of the following is true for all amino acids?Select the correct response(s):They are amphoteric in nature.They are positively charged.They are amphipathic in nature.They have an amino and carboxyl moieties.They are chiral in nature.They are left-handed molecules.They are acidic in nature.They are neutral in net charge.They have a primary amine.

The four types of biological macromolecules are proteins, nucleic acids, lipids and carbohyrates.…

Answered: Which of the following is true for all…

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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Similar questions

What type of intermolecular forces exists between the side chains of each of the following pairs of amino acids? serine and threonine isoleucine and valine arginine and aspartic acid cysteine and cysteine
Which of the following is true of sphingolipids? They always contain glycerol and fatty acids. They may be charged, but are never amphipathic. They contain two esterified fatty acids. Phosphatidylcholine is a typical sphingolipid. The sphingosine backbone is O-linked to a head group.
What do most amino acids have in common with most monosaccharides? Both contain ionizable groups that lack pka values. Both non-enzymatically attach themselves to nucleic acids. Both are transported by albumin within the blood. Both exist as isomers, due to differences in stereochemistry.
When drawing the structure of an amino acid, which of the following statements is true? The amino group is positively-charged at physiological pH (7.4). The alpha carbon is the second carbon within the R group of the amino acid. The carboxy group is positively-charged at physiological pH (7.4). 3 of these 4 responses are correct. The amino group is drawn to the right side of the alpha carbon.
Which of the following is not true about a-amino acids? have at least 2 pka values O negatively charged at pH = 1.0 most contain one chiral center can act as buffers
are all 20 amino acids insoluble in water? truee or false 7
Amino acids with ionizable side chains are found in all groups except: negatively-charged positively-charged polar hydrophobic
Lipoprotein particles (Figure 3.18) are spherical clusters of protein and lipid molecules that circulate in the blood of animals and are rather substantial in size (see Figure 3.11). They function similarly to suitcases, transporting cholesterol, fatty acid residues, triglycerides, and phospholipids from one location in the body to another throughout the body. In light of your knowledge of lipid insolubility in water, which of the four types of lipids would you expect to be on the exterior of a lipoprotein clump that is bathed in the water-based fluid part of blood?
What is the percent ionization of these amino acids? 1. Aspartame at pH 5.4 2. Glutamate at pH 11.8 3. Histidine at pH 8.0 4. Tyrosine at pH 8.0
Of the following natural fatty acids, which is predicted to have the HIGHEST melting point? Not enough information to answer correctly O [18:0] [18:1] [20:1] [20:0]
Which noncovalent interactions (discussed in Section 8.2) are responsible for the cohesion of lipid molecules? Is the overall strength of these forces weak or strong? Why are lipids incompatible with water?
Why do amino acids display a lower pKa value for the carboxylic acid group compared to acetic acid? The chirality of the amino acid favors the deprotonation of the carboxylic acid function. The ammonium function on the chiral center helps to stabilize the negative charge on the carboxylate. Amino acids have a higher melting point than acetic acid. The carboxylate ion is stabilized by the side chain of the amino acid. The negative charge on the carboxylate is stabilized by resonance with the amino group.

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