7. All amino acids have a chiral a-carbon EXCEPTA) ProlineB) AlanineC) GlycineD) Tryptophan8.In proteins, amino acids are linked by peptide bonds; in polynucleotides,nucleotides are linked byA) Phosphoanhydride bondsB) 3'-5'phosphodiester bondsC) 5'-3'phosphodiester bondsD) Phosphoester bonds9. The melting temperature of DNAA) IncreasesB) DecreasesC) Stays the sameD) Has no relationPlease I need the solution in 10 minutesA) HigherB) LowerC) SimilarD) Zerowith increasing G plus C content.10. Supercoiled DNA hassame number of base pairs when subjected to gel electrophoresis.C) a phosphodiester bondD) a 2' -H groupmobility when compared relaxed DNA with the11. The difference between a nucleoside and a nucleotide isA) the presence of uracilB) a phosphate group12. Tyrosine and tryptophan are less hydrophobic than phenylalanine becauseA) Phenylalanine has an indole groupB) Tyrosine and tryptophan have smaller R groupsC) Phenylalanine is a phenolD) Phenylalanine has no polar group in the side chain

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Answered: 7. All amino acids have a chiral…

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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38) A nucleic acid sequence is read from the A) free 3' hydroxyl; free 5' phosphate B) free 3' phosphate; free 5' hydroxyl C) free 5' phosphate; free 3' hydroxyl D) free 5' hydroxyl; free 3' phosphate to the
Carbons is used in cells for a) forming the charge across the membrane by serving a positive cations b) as the structural backbone of most molecules c) forming the second most common element D) none of these
Peptide bonds cannot rotate. This is because: a) the amino acid side chains are too bulky to allow this. B) Internal hydrogen bonding hinders rotation. C) interaction with water molecules hinders rotation D) the peptide bond has considerable double bond character Polypeptide chains prefer the trans conformation. This is because: a) This distances hydrophilic groups from hydrophobic groups b) this minimizes crowding of side chains c) This brings hydrophilic groups in contact with water molecules d) This allows proteins to fold more easily Ramachandran plots indicate that protein conformation is largely a function of: a) hydrophobicity b) number of amino acids c) torsion angles d) arrangement of prosthetic groups
DNA is composed of which are attached to each other by bonds. O A) nucleotides. phosphodiester O B) amino acids.. peptide C) monosaccharides. glycosidic O D) nucleotides. hydrogen O E) amino acids.. hydrogen
Which of the following is an example of secondary protein structure?A) DipeptideB) TriglycerideC)α -helixD) Amino acidE) Fatty acid
4. Molecule #4 a)What Group? (Carb, Lipid, Protein, or Nucleic Acid). b)Within the group, how would you classify it? a) -NH b) "NH2 но-р-о онон c)How do you know you correctly classified this macromolecule in its proper group? O=a-o
What is the name of the bond formed between adjacent amino acids in a protein?Question 34 options: A) hydrogen B) carboxyl C) peptide D) ester E) phosphodiester
Hemoglobin has two alpha-type chains and two beta-type chains. This would be a description of: a) primary structure b) secondary structure c) tertiary structure d) quaternary structure Myoglobin has much helix-turn-helix motif. This would be a description of: a) primary structure b) secondary structure c) tertiary structure d) quaternary structure Myoglobin folds up into a ball-like structure. This would be a description of: a) primary structure b) secondary structure c) tertiary structure d) quaternary structure Domains differ from subunits in that: a) subunits are connected by peptide bonds while domains are not b) domains are connected by peptide bonds while subunits are not c) subunits are larger than domains d) subunits are hydrophobic while domains are hydrophilic
Which of the following describes a primary protein structure?A) Protein structure maintained by disulfide linkages.B) Amino acid sequence maintained by peptide bonds.C) Protein chains maintained by interactions of peptide backbones like an α-helix.D) Arrangement of multiple protein subunits.E) Protein structure maintained through multiple hydrogen bonds.
23. In the structure below, the shaded areas H Ca Ca. H a) SDS gel electrophoresis b) mass spectrometry c) Edman degradation d) size exclusion chromatography Ca a) are unable to freely rotate around the C-N bond b) represent resonance structures c) represent a partial double bond between C and N d) all of the above Ca. 24. Which of the following protein separation techniques allows for the recovery of protein?

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