BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
expand_more
expand_more
format_list_bulleted
Question
Chapter 6, Problem 3A
Summary Introduction
Introduction:
The cells use the ATP (adenosine triphosphate) molecules for carrying out the energy-requiring processes. The ATP is the high energy phosphate compound. The energy of the cell is stored in the bonds of the ATP molecule. Hence, it is also referred to as the currency of the cell.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
1. The phosphorylation of glucose with HPO42- forms glucose 1-phosphate and water and requires 5.0kcal/mol of energy.
a. Write the equation for this reaction.
b. This unfavorable reaction can be driven by the hydrolysis of ATP to ADP. Write the equation for the coupled reaction.
c. Calculate the energy change for coupled reaction
oxidase
12 Cyanide is a toxic chemical that hinders the production of ATP by inhibiting the enzyme cytochrome
a. Using the graph to explain whether cyanide's inhibition of cytochrome oxidase is competitive or non
competitive inhibition. Provide evidence to support your answer.
b. Using the graph below, draw an additional curve on the graph here you would expect the other type of
inhibition to lie and label the lines competitive and non competitive inhibitor.
Reaction
Rate
↑
-Without Cyanide ->
With Cyanide
Substrate Concentration ㅋ
Question 23
An enzyme has a single active site at which it can bind and hydrolyze either X or
Y but the enzyme cannot bind X and Y at the same time. Which of the following
statements are TRUE?
Multiple answers: Multiple answers are accepted for this question
Select one or more answers and submit. For keyboard navigation... SHOW MORE V
The Km for X will be affected if Y is present in the reaction mixture.
a
Y is a competitive inhibitor of X.
The Km for X will increase.
d.
The V for X will be affected if Y is present in the reaction mixture.
max
pH dependence of Vmax reflects the ionization state of catalytic site
e
residues.
Consider the following: X and Y are methanol (poisonous) and ethanol
respectively. If the Km for X = 0.01 M and the Km for Y = 0.001 M then
0.01 M Y is 10 times the concentration of Y required for 0.5 Vmax.
Addition of an enzyme to a chemical reaction increases the ratio of
g
products to reactants (Keg).
Chapter 6 Solutions
BIOLOGY
Ch. 6.1 - Prob. 1LOCh. 6.1 - Prob. 2LOCh. 6.1 - Describe the nature of redox reactions.Ch. 6.2 - Explain the laws of thermodynamics.Ch. 6.2 - Prob. 2LOCh. 6.2 - Contrast the course of a reaction with and without...Ch. 6.3 - Describe the role of ATP in short-term energy...Ch. 6.3 - Prob. 2LOCh. 6.4 - Discuss the specificity of enzymes.Ch. 6.4 - Explain how enzymes bind to their substrates.
Ch. 6.4 - Prob. 3LOCh. 6.5 - Prob. 1LOCh. 6.5 - Prob. 2LOCh. 6.5 - Prob. 3LOCh. 6 - Prob. 1DACh. 6 - A covalent bond between two atoms represents what...Ch. 6 - During a redox reaction the molecule that gains an...Ch. 6 - Prob. 3UCh. 6 - A spontaneous reaction is one in which a. the...Ch. 6 - Prob. 5UCh. 6 - Which of the following is NOT a properly of a...Ch. 6 - Where is the energy stored in a molecule of ATP?...Ch. 6 - Prob. 1ACh. 6 - Which of the following statements is NOT true...Ch. 6 - Prob. 3ACh. 6 - Prob. 4ACh. 6 - Enzymes have similar responses to both changes in...Ch. 6 - Prob. 6ACh. 6 - Examine the graph showing the rate of reaction...Ch. 6 - Phosphofructokinase functions to add a phosphate...
Knowledge Booster
Similar questions
- Relating to bioenergetics: a. The equilibrium constant for a particular reaction is 6.8 x 10-5 which makes this reaction exergonic. True or False?b. All processes that occur in the universe are spontaneous and have low enough activation energies that molecules can often overcome the energy barrier. True or False?c. ATP has a highly negative free energy change in part because the negative charges on the oxygens repel each other in ATP but less so in ADP. True or False?arrow_forwardWhich of the following statements correctly describe(s) the reaction: ADP + Pi + H+ → ATP + H2O ΔG°'= +7.29 kcalmolkcalmol A. ATP is less stable than ADP. B. Hydrolysis of ATP is spontaneous. C. Phosphorylation of ADP is nonspontaneous. D. Conversion of ATP to ADP will release heat.arrow_forwarda. Use the values in Problem 23.31 to calculate the energy change in the following reaction. fructose 1,6-bisphosphate + ADP--------> fructose 6-phosphate + ATP b. Is this reaction energetically favorable or unfavorable? c. Write this reaction using curved arrow symbolism. d. Can this reaction be used to synthesize ATP from ADP? Explain.arrow_forward
- Evaluate the following statements concerning enzyme kinetics. Which one of the statements is false? a. Enzyme saturation fluctuates. b. In an uninhibited enzymatic reaction system, adding an excess of substrate will increase the reaction velocity beyond Vmax. c. The Vmax of an enzyme kinetics graph represents the point at which the enzyme is saturated with substrate. d. Non-competitive inhibition of an enzymatic reaction can be overcome by adding more unaltered enzyme. e. The activation energy of a reaction can be reduced by the presence of an enzyme.arrow_forwardWhich of the following statements about a plot of V0 vs. [S] for an enzyme that follows Michaelis-Menten kinetics is false? a. As [S] increases, the initial velocity of reaction V0 also increases. b. At very high [S], the velocity curve becomes a horizontal line that intersects the y-axis at Km. c. Km is the [S] at which V0 = 1/2 Vmax. d. The shape of the curve is a hyperbola. e. The y-axis is a rate term with units of μm/min.arrow_forwardI need the answer as soon as possiblearrow_forward
- Using understanding of the thermodynamics laws, explain the energy transformations for the following processes. a. Glucose – Pyruvase + 2ATF + 2NADH b. Pyruvate – Acetyl-CoA + NaDH c. Citric acid – Oxoloacetate + 3NaDH + FADH2 + ATP d. H20 at PSII – ATP e. Photon at PSI – NADPH f. Co2 + RuBp – 3PG + ATP + NADPH – G3P (1/6 of which is converted to glucose)arrow_forwardCalculate for the following based on complete oxidation of 5 molecules of trisaccharide containing 2 hexoses and 1 triose. a. Total number of ATP produced= b. Total number of CO2 released= c. Total number of ATP from oxidative phosphorylation= d. Total number of ATP from NADH= e. Total number of ATP from substrate level of phosphorylation in Glycolysis=arrow_forwardWhat does the Michalis-Menten equation tell you? A. The velocity of an enzyme under physiological conditions B. The variation of enzyme activity as a function of [substrate] C. The quantity of reactant that disappears per unit time D. A and B E. B and C Vo = Vmax [S] KM + [S] Vo = Vmax® [S] KM + [S]arrow_forward
- PEP and 2-PG have similar amounts of potential metabolic energy with respect to decomposition to Pi, CO2 and H2O, but the enolase reaction: a. creates a much more unstable reactive intermediate. b. rearranges 2-PG to a form with greater binding potential to the enzyme. c. rearranges 2-PG into a form from which more potential energy can be released by hydrolysis. d. changes the DG of the reaction to increase the potential energy. e. none are true. 2.Lactate produced by anaerobic muscle tissue is: a. stored in muscle until oxygen is available. b. further reduced to glycerol in muscle. c. transferred to erythrocytes to release oxygen from hemoglobin. d. carried by the blood to the liver for gluconeogenesis and converted to glucose. e. none of the above. 3. Which of the following enzymes is NOT used when fructose is metabolized to pyruvate in the liver? a. triose phosphate isomerase b.…arrow_forwardThe Km value of an enzyme-catalyzed reaction and its Vmax is 70 mmol/min. What is the rate of the reaction of the reaction when the substrate concentration is 7 × 10−2 mmol/min? a. 35 mmol/min b. 50 mmol/min c. 60 mmol/min d. 70 mmol/minarrow_forwardIt takes 9.4 msec for Enzyme X to catalyse a single reaction when it is fully saturated with substrate. Calculate the Vmax of the reaction if the concentration of Enzyme X is 2.4 mM. Select one: a. 26 mM/sec X b. 3.9/sec c. 0.26 M/sec d. 0.039 M/sec e. 106.4 M/secarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning