Zwitterion Study guides, Class notes & Summaries

Biochemistry Test 1 Questions and Answers Graded A+ biochemistry a discipline in biochemistry; is the description of molecules in biology/chemistry of proteins molecular biology a discipline in biochemistry; the manipulation of DNA, genetics cell biology a discipline in biochemistry; larger scale, functions and mechanisms within a cell/cell energetics cellulose a natural polymer; found in plants for storage glycogen a natural polymer; found in animals for storage protein a natural polymer; ...

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...

The net charge of the zwitterion form of Gly is ___ - Zero When a peptide bond is formed, an ___ reacts with a carboxylate group - Amino Group At a pH above the pKa, the phenol group of tyrosine is - Deprotonated In the tripeptide Lys-Pro-Ile, there are ___ charged groups at pH 7 - Three at a pH below the pKa, the ε-amino group of lysine is - Protonated at a pH below the pKa, the β-carboxylate group of Asp is ___ - uncharged; Protonated In the peptide Trp-Ser-Val, valine is at the - C-te...

The net charge of the zwitterion form of Gly is ___ - Zero When a peptide bond is formed, an ___ reacts with a carboxylate group - Amino Group At a pH above the pKa, the phenol group of tyrosine is - Deprotonated In the tripeptide Lys-Pro-Ile, there are ___ charged groups at pH 7 - Three at a pH below the pKa, the ε-amino group of lysine is - Protonated at a pH below the pKa, the β-carboxylate group of Asp is ___ - uncharged; Protonated In the peptide Trp-Ser-Val, valine is at the - C-te...

The net charge of the zwitterion form of Gly is ___ - Zero When a peptide bond is formed, an ___ reacts with a carboxylate group - Amino Group At a pH above the pKa, the phenol group of tyrosine is - Deprotonated In the tripeptide Lys-Pro-Ile, there are ___ charged groups at pH 7 - Three at a pH below the pKa, the ε-amino group of lysine is - Protonated at a pH below the pKa, the β-carboxylate group of Asp is ___ - uncharged; Protonated In the peptide Trp-Ser-Val, valine is at the - C-te...

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...

Biochemistry Test 1 questions and answers biochemistry a discipline in biochemistry; is the description of molecules in biology/chemistry of proteins molecular biology a discipline in biochemistry; the manipulation of DNA, genetics cell biology a discipline in biochemistry; larger scale, functions and mechanisms within a cell/cell energetics cellulose a natural polymer; found in plants for storage glycogen a natural polymer; found in animals for storage p...

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...

The chirality of an amino acid results from the fact that its α carbon: A) has no net charge. B) is a carboxylic acid. C) is bonded to four different chemical groups. D) is in the L absolute configuration in naturally occurring proteins. E) is symmetric. C) is bonded to four different chemical groups. Of the 20 standard amino acids, only ___________ is not optically active. The reason is that its side chain ___________. A) alanine; is a simple methyl group B) glycine; is a hydrog...

ACS BIOCHEMISTRY FINAL EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS 2023