Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Question
Chapter 4, Problem 52TQ
Summary Introduction
To review:
The reason behind ATP (adenosine triphosphate)being the most suitable “energy currency” molecule for the cell.
Introduction:
Adenosine triphosphate (ATP) is an organic chemical. It provides energy for the completion of many processes within the cell. In biochemistry, the classification of ATP is done as a nucleoside triphosphate.
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Students have asked these similar questions
Question 4.
Diabetes mellitus possesses a serious health challenge worldwide and there has been an
increased awareness for self-monitoring and point of care testing. The development of self-
monitoring of blood glucose (SMBG) is probably the most important advance in controlling
diabetes since the discovery of insulin.
a) Dextrostix, the first glucose meter was invented by Ernie Adams. Briefly discuss.
b) There are three principles of enzymatic reactions, utilized by current glucose meters.
Compare and briefly discuss these three principles.
Question 9
The nucleoside monophosphates are seen in metabolic pathways because their phosphoric anhydride bonds can be hydrolyzed off for
energy.
A) True
B) False
Question 1: When the CAC is run in reverse by microorganisms that use it to fix carbon, the citrate synthase reaction is different and is catalyzed by an enzyme called ATP-citrate lyase. Write the reaction catalyzed by ATP-citrate lyase, then briefly (in one sentence) explain why the use of different chemistry (different from the ‘normal’ direction) makes sense here.
Chapter 4 Solutions
Biochemistry: The Molecular Basis of Life
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Ch. 4 - Prob. 9RQCh. 4 - Prob. 10RQCh. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - Prob. 16RQCh. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - Prob. 19RQCh. 4 - Prob. 20RQCh. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - Prob. 25RQCh. 4 - Prob. 26RQCh. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30FBCh. 4 - Prob. 31FBCh. 4 - Prob. 32FBCh. 4 - Prob. 33FBCh. 4 - Prob. 34FBCh. 4 - Prob. 35FBCh. 4 - Prob. 36FBCh. 4 - Prob. 37FBCh. 4 - Prob. 38FBCh. 4 - Prob. 39FBCh. 4 - Prob. 40SACh. 4 - Prob. 41SACh. 4 - Prob. 42SACh. 4 - Prob. 43SACh. 4 - Prob. 44SACh. 4 - Prob. 45TQCh. 4 - Prob. 46TQCh. 4 - Prob. 47TQCh. 4 - Prob. 48TQCh. 4 - Prob. 49TQCh. 4 - Prob. 50TQCh. 4 - Prob. 51TQCh. 4 - Prob. 52TQCh. 4 - Prob. 53TQCh. 4 - Prob. 54TQCh. 4 - Prob. 55TQCh. 4 - Prob. 56TQCh. 4 - Prob. 57TQCh. 4 - Prob. 58TQCh. 4 - Prob. 59TQCh. 4 - Prob. 60TQCh. 4 - Prob. 61TQCh. 4 - Prob. 62TQ
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- The synthesis of enzymes in response to changing metabolicneeds is referred to as _____________________.arrow_forwardA metabolic pathway that functions in both anabolic andcatabolic processes is called an _____________________pathway.arrow_forwardFour important properties of enzymes are high catalytic rate,high degree of substrate specificity, negligible formation ofside products, and _____________________.arrow_forward
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- Question 9 Which of the following is TRUE of the branching reaction of glycogen? a) Each linear chain of glucosyl units can have a maximum of four branches attached to it. b) The branch point cannot be within six residues of a preexisting branch point. c) A chain of glucosyl units must be at least seven units long to be a substrate for the branching enzyme. d) The block of glucosyl residues transferred to form a branch is usually three residues in length. e) A chain of glucosyl units must be at least 11 units long to be a substrate for the branching enzyme.arrow_forwardQUESTION 17 calculate the KM AND the total amount of enzyme present in these experiments. The following equations relate to this question. (Hint 1: some data is directly apparent without need to do calculations; Hint 2: Watch your exponents.) Kcat= Substrate concentration (mm) 1 2 4 6 100 1,000 The turnover number for an enzyme is known to be 5,000 min-1. From the following set of data, 250 334 376 500 500 Vmax [Et] Initial velocity (μmol/min) 167 G. 10 mM H. 250 uM 1. 2 mM J. 100 mM Part 1 Total Enzyme amount (choose from options A-E) Part 2 ( Enzyme KM: (choose from options G-J) A. Total enzyme = 10 umol B. Total enzyme = 0.1 umol OC. Total enzyme = 100 μmol D. Total enzyme = 1000 μmol E. Total enzyme = 10 μmol OF Vo = Vmax[S] KM + [S]arrow_forwardQuestion 3. Dihydrofolate reductase (DHFR) is capable of making one carbon moieties of various oxidation states (i.e., methanol, formaldehyde, formate). Folic acid, a B vitamin, provides the critical chemistry: R. This type of chemistry is utilized in the synthesis of nucleotides. Methotrexate has a significantly higher affinity (Kd - 50 pM) than folate for the enzyme and is used in cancer therapy to suppress DNA synthesis of rapidly dividing cancer cells. What is a tempting reason for methotrexate having such high affinity?arrow_forward
- Enzymes which are activated by many second messanger systems, and transfer a phosphate group from ATP to a protein, setting off a series of intracellular events that lead to an ultimate cellular response, are known as__________.arrow_forwardIn living organisms, _____________ is the high-energy molecule that links food molecule degradation reactions with biosynthetic reactions.arrow_forwardQuestion 174 Why are false-negative results usually more common than false-positive results in biochemical and metabolic assays that detect the product of enzymatic reactions? O Positive results require the product being assayed for to be formed in adequate quantities to be observed and this is unlikely to occur spontaneously. O Cultures that do not grow well during the incubation for some reason can test negative due to low product formation even when they do have the enzyme being assayed for All of these O Most assays require a reagent to react with a product to produce a color change, and failure to react, perhaps due to bad reagents, will be interpreted as negative.arrow_forward
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