Which of the following amino acids is not part of tetramer that is bounded to NAM and glycine? O Llys O L-Glu O D-Ala O D-Glu O L-Ala
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- QUESTION NO. 1Targeting a protein to be degraded within proteasomes usually requires ubiquitin. In the function of ubiquitin all of the following are true except: A. ATP is required for activation of ubiquicin. B. a peptide bond forms between the carboxyl terminal of ubiquitin and an ε-amino group of a lysine . C. linkage of a protein to ubiquitin does not always mark it for degradation. D. the N-terminal amino acid is one determinant of selection for degradation. E. ATP is required by the enzyme that transfers the ubiquitin to the protein to be degraded QUESTION NO. 2Much of procollagen formation occurs in the endoplasmic reticulum and Golgi apparatus which requires signal peptide. All of the following statements about targeting a protein for the ER are true except. A. signal peptide usually has a positively charged N-terminus and a stretch of hydrophobic amino acids. B. signal peptide emerging from a free ribosome binds signal recognition…Question 11. // Hint: Isoelectric focusing separates proteins based on their pI values, and can separate proteins that only differ by a net charge of ±1.±1. Recall that an amino acid residue with a negatively charged R group has a relatively low isoelectric point (pI) where it has zero net charge. Likewise, an amino acid residue with a positively charged R group has a relatively high isoelectric point (pI) where it has zero net charge. Order from Low pH to High pHquestion 38 The constant region of each heavy chain determines the class of the heavy chain. True False
- QUESTION NO.1which of the following are chemical characteristics of monosaccharides? A. They contain multiple hydroxyl groupsB. they contain an aldehyde or ketone group C. They contain a branching carbon backbone D. They contain a carbon-carbon double bond E. Every carbon in a monosaccharide is fully reduced F. Every carbon in a monosaccharide is a chiral centerQUESTION NO.2 glucose absorption is hindered by _________ deficiency A. Retinol B. Thiamine C. Potassium D. Sodium E. Ascorbic acid F. Calciferol QUESTION NO.3 phospholipids is made primarily from A. L-glycerol 1-phosphate B. L-glycerol 3-phosphate C. D-glycerol 3-phosphate D. -glycerol 1-phosphate E. sn-glycerol 1-phosphate F. sn-glycerol 3-phosphatequestion 24 DNA is a hereditary molecular that is composed of A Deoxyribose,phosphate, and nitrogen bases B Deoxyribose,a pentose, and nucleic acids C Sugar,proteins and thymine D Adenine, phosphate, and riboseQuestion 1Predicting Secondary Structure Which of the following peptides is more likely to take up an -helical structure, and why? (a) LKAENDEAARAMSEA (b) CRAGGFPWDQPGTSN
- Question 10. All of the following areparts of a nucleotide EXCEPT:A. a five-carbon sugar.B. a six-carbon sugar.C. a phosphate group.D. a nitrogenous base.Question 10 (2 points) A protein heterodimer would be considered an example of: -primary structure -secondary structure -tertiary structure -quaternary structure -atomic structureQuestion 22: which of the following secondary structures would you expect to find on the surface of a globular protein? Alpha helix Beta sheet Loops between two alpha-helices None of the above because water would disrupt the hydrogen bonding that stabilizes these structures A,B and C as long as the polar and charged amino acid side chains face the surface of the protein.
- QUESTION 3 Strands of DNA join together with Hydrogen bonds. These bonds form between the Nitrogenous bases. These bonds are specific and only occur betwwe A. Aand T form 3 bonds, and G and C form 2 bonds B. Aand G form 3 bonds, and T and C form 2 bonds C. Aand T form 2 bonds, and G and C form 3 bonds D. U and T form 3 bonds, and A and C form 2 bondsQuestion No.1 (1) A positive Tollen’s test classifies a monosaccharide as a reducing sugar. (2) The bond which links the two monosaccharides of a disaccharide together is a peptide bond. (3) Monosaccharides cannot be broken done into simpler units by hydrolysis reactions. Which of the following statements are true? Question No. 2 : Assuming that a strand of DNA has the following sequence: 5'-AACCGGTT-3' What is the sequence of complementary strand of DNA, from the 5' to the 3' direction?QUESTION NO. 1 Cystic fibrosis is a frequent generic disease of Caucasians. The CF gene codes for a protein called the cystic fibrosis transmembrane conductance regulator (CFTR) which functions as a cAMP-regulated chloride channel. The protein has two membrane-spanning domains, two domains that interact with ATP, and one regulatory domain. The most common defect is in the gene for one of the ATP binding domains. The result is a protein that does not fold correctly in the endoplasmic reticulum, is not properly glycosylated, and is nor transported to the cell surface. Rather, it is degraded in the cytosol within proteasomes. Drugs that foster chaperone interaction with the mutant protein are a potential therapeutic approach. Chaperones A. are always required to direct the folding of proteins. B. when bound to protein increase the rate of protein degradation. C. usually bind to strongly hydrophilic regions of unfolded proteins. D. sometimes maintain proteins in an…
