Question 6In membranes, one of the most common targets of reactive oxygen species aresaturated fatty acidspolyunsaturated fatty acidscholesterol

Fatty acids are carboxylic acids with a hydrocarbon chain. Saturated fatty acids are fatty acids…

Answered: Question 6 In membranes, one of the…

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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Question 9 The product of the oxidation of glyceraldehyde 3-phosphate is: O 2-phosphoglycerate O 1,3-biphosphoglycerate O phosphoenolpyruvate O fructose 1,6-biphosphate oxaloacetate Previc
Question 5 An a-helix has the sequence: NH3-Ser-Glu-Gly-Asp-Trp-Gln-Leu-His-Val-Phe-Ala-Lys-Val-Glu- COO-. The carbonyl oxygen (in the peptide bond) of the W5 residue is hydrogen bonded to the amide nitrogen of H8 E2 O V9 O S1
QUESTION 10 Which one of the following statements does NOT correctly describe the current state of the chymotrypsin-substrate complex below or the next mechanistic step that occurs? s,' G193 S195 NH NH R -NH R-NH HN- Ser-195 His-57 HN Asp-102 OA. This intermediate is part of a nucleophilic acyl substitution reaction. OB. In the next step His-57 protonates Ser-195. O C. In the next step His-57 activates a water molecule. O D. In the next step His-57 protonates the leaving group. OE. In the next step the N-terminal fragment of the original substrate departs.
Question 23 What kind of membrane protein is found entirely outside the bilayer on either the extracellular or cytoplasmic surface? These proteins are covalently linked to a membrane lipid situated within the bilayer. O integral protein O carbohydrate-anchored protein O lipid-anchored protein O peripheral proteins
QUESTION 10 Two chambers, X and Y, are separated by a semi-permeable membrane that allows water and urea, but not glucose, to pass through. At the start, chamber X contains a solution of urea in wate and chamber Y contains a solution of glucose in water. The molarity (measure of concentration) of urea in chamber X is the same number as the molarity of glucose in chamber Y. Which of the following will occur after sufficient time? There will be overall diffusion of urea from X to Y until urea concentration is equal in both chambers. There will be overall diffusion of urea from Y to X until urea concentration in X exceeds urea concentration in Y. There will be overall diffusion of urea from Y to X until urea concentration is equal in both chambers. Urea will not diffuse across the membrane. There will be overall diffusion of urea from X to Y until urea concentration in Y exceeds urea concentration in X.
QUESTION 13 Two chambers, X and Y, are separated by a semi-permeable membrane that allows water and urea, but not glucose, to pass through. At the start, chamber X contains a solution of urea in wate and chamber Y contains a solution of glucose in water. The molarity (measure of concentration) of urea in chamber X is the same number as the molarity of glucose in chamber Y. Which of the following will occur after sufficient time? There will be overall diffusion of water from Y to X. There will be no overall diffusion of water across the membrane. There will be overall diffusion of water from X to Y.
Question 3 (1 point) In glycolysis, the net production of ATP is ATP. In the Krebs cycle, it is ATP, and in the electron transport chain, it is ATP. Thus, a total of ATP are produced during cellular respiration. O 2, 4, 16, 32 O 4, 4, 30, 36 O4, 2, 32, 38 O 2, 2, 32, 36
QUESTION 23 Which of the following describes a way in which receptor + ligand interactions are different than enzyme + substrate interactions? O Receptors transmit signal, enzymes catalyze reactions. Receptors cannot bind to ligands, enzymes can bind to substrates. Ligands are proteins, substrates are not proteins. Ligands are intracellular only, substrates are extracellular.
Question 23 This molecule is H- но H- HO HO- ČHOH O The enantiomer of glucose O A reducing sugar A ketose O Glucose
Question 15 About tryptophan: A None of the above statements is right. B It exhibits two carboxylic acid functions and one amide function. |C It is a cyclic amino acid, that strongly ab- sorbs light at 280 nm. D Its 3-letter code is Try and its one-letter code is T. E It is positively charged at pH 12.
QUESTION 48 In facilitated diffusion, the diffusion rate of a specific molecule across a membrane does not continue to increase as the molecule's concentration difference across the membrane increases beyond a certain point. The reason is that O a. facilitated diffusion requires the use of ATP. O b. as the concentration difference increases, molecules interfere with one another. O c. the carrier proteins become saturated. O d. the transport protein is a channel protein. O e. the diffusion constant depends on the concentration difference.
Question 31 In humans, phenylalanine is an essential amino acid due to our lack of: Ophenylalanine hydroxylase O tyrosine O hypoxantine-guanine phosphoribosyltransferase (HGPRT) O phenylpyruvate O none of the above

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Question 6 In membranes, one of the most common targets of reactive oxygen species are saturated fatty acids polyunsaturated fatty acids cholesterol