Zwitterion - Study guides, Class notes & Summaries
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Biochemistry comprehensive examination with 100% verified answers 2024
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Biochemistry comprehensive examination with 100% verified answers 2024 
All amino acids contain a central carbon, a side chain (R group), an amino group and a __________ group. 
Carboxyl 
 
 
 
Amino acids can undergo a proton transfer, thus giving both a (+) and (-) charge. This molecular state is called the ________. 
Zwitterion 
 
 
Amino acid that are unable to be synthesised from biochemical pathways within a cell have to be consumed through dietary intake. These are called _______ amino ac...
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AQA A Level Chemistry 2022 Paper 2 SOLUTION 2023//2024
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How can we make polymers more flexible? - ANSWER By adding a plasticiser 
How do plasticisers make polymers more flexible? - ANSWER They stick between the 
chains and keep the polymers further apart from each other, weakening the van der 
Waals forces and lets chains slide more easily. 
Uses of Kevlar - ANSWER bulletproof and used in body armour. 
Uses of Nylon - ANSWER commonly used in textiles. 
Why are polymers strong? - ANSWER Polymers are bound by van der Waals forces. 
The intermolecula...
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BIOCHEMISTRY FINAL EXAM QUESTION WITH CORRECT HIGHLIGHTED ANSWERS 2023/2024 GRADED A+
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BIOCHEMISTRY FINAL EXAM QUESTION WITH CORRECT HIGHLIGHTED ANSWERS 2023/2024 GRADED A+ 
1.	The β -pleated sheet forms when two or more peptide chain, called strands, line up side by side with the C=O and N-H bonds in the plane of the sheets 
A. true 
a. false 
2.	when the amino acid alanine (the R group is ـCH3) is added to a solution with a pH of 7.3 alanine become 
A.	zwitterion 
B.	nonpolar 
C.	cation 
D.	anion 
3.	the α amino acid have a carboxyl group with a pK around _____ and a...
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BCH 451 Final Exam Exam Study Guide.
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©BRIGHTSTARS EXAM SOLUTIONS 
11/15/2024 11:57 AM 
1 | P a g e 
BCH 451 Final Exam Exam Study Guide. 
Van der waals interaction - answerThe () describes the relation between inter atomic 
distances, electronic charge, solution dielectric and free energy. 
Quaternary structure - answerProtein () defines the relation among subunits in a 
multisubunit lattice 
primary structure - answerProtein () defines the amino acid sequence 
tertiary structure - answerProtein () defines the packing of helices, ...
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FSC 325 Quizzes (Passed!)
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T/F Foods containing high moisture content always possess high water activity. correct answers False 
 
Most bacteria will be inhibited by a water activity (aw) level of ____ or below. correct answers 0.9 
 
Removal of water from food or decreasing water activity will_____ many enzymatic reactions and _____ correct answers Slow, inhibit 
 
T/F Glucose in its D form occurs naturally in food correct answers True 
 
T/F Monosaccharide is simple carbohydrate which contain three to nine carbon atoms ...
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BCH2333 - Building Blocks Part 2 (Thermodynamics, Nucleic Acids, Amino Acids & Peptides, Carbohydrates, and Lipids) Q's & A's
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BCH2333 - Building Blocks Part 2 (Thermodynamics, Nucleic Acids, Amino Acids & Peptides, Carbohydrates, and Lipids) 
 
Quantitation of pI - Answer- pI can be quantified by Henderson-Hasselbalch equation: (pKa^-1 + pKa^+1)/2 
the average of the pKas relates to the ionization of the zwitterion 
 
pI of Proteins (polyampholytes) - Answer- Proteins contain up to hundreds of pH-responsive groups; when the net charge of protein is 0, anions balance cations and the pI is reached 
 
@pH<pI, net charg...
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ACS Biochemistry Final (100% Correct Answers)
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pKa (chapter 3) correct answers measure of the tendency of a group to give up a proton (acidity); tendency decreases tenfold as pKa increases by one unit 
 
thioester bond (1) correct answers compounds with functional group C-S-CoA-C (eg, in acetyl-CoA) 
 
zwitterion (3) correct answers dipolar ion with both positive and negative groups but overall neutral charge; can act as either an acid or base 
 
Isoelectric point (pI) (chapter 3) correct answers the characteristic pH at which the net electr...
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MCAT Biochemistry Review Exam Questions And Correct Answers
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©THEBRIGHT EXAM STUDY SOLUTIONS 8/22/2024 12:54 PM 
MCAT Biochemistry Review Exam 
Questions And Correct Answers 
Amino Acid - answerDipolar compound containing an amino group and a carboxyl group 
Amino Group - answer-NH2 
Carboxyl Group - answer-COOH 
Alpha Carbon - answerCentral carbon atom in amino acid 
Attached to amino & carboxyl groups, H atom, and side chain 
Side Chain - answerThe variable component of an amino acid that gives the amino acid its 
identity and chemical properties 
also...
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MCAT Organic Chemistry Exam Questions And Correct Answers
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©THEBRIGHT EXAM STUDY SOLUTIONS 8/22/2024 12:54 PM 
MCAT Organic Chemistry Exam Questions 
And Correct Answers 
Electrostatic Forces - answerThe attractive force between electrons and the nuclei that is 
responsible for all molecular bonds. 
Coordinate Covalent Bond - answerOne nucleus donates both of the electrons in the bond. 
Hybridization - answersp - 180° - linear 
sp2 - 120° - trigonal planar 
sp3 - 109.5° - tetrahedral, pyramidal, or bent 
dsp3 - 90°, 120° - trigonal-bipyramidal, se...
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Biochemistry - Exam 1 Practice Questions & Answers 2023/2024 A+
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Biochemistry - Exam 1 Practice Questions & Answers 2023/2024 A+ 
 
In a bacterial cell, the DNA is in the: 
A) cell envelope. 
B) cell membrane. 
C) nucleoid. 
D) nucleus. 
E) ribosomes. 
nucleoid 
A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: 
A) DNA. 
B) photosynthetic capability. 
C) plasma membranes. 
D) ribosomes. 
E) the nucleus 
the nucleus 
In eukaryotes, the nucleus is enclosed by a double membrane called the: 
A) cell membrane. 
B) nuc...
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