2. For the enzyme phosphofructokinase (PFK-1), a highconcentration of AMP in the cell will• downregulate the enzyme by shifting thecurve to the right.downregulate the enzyme by shifting thecurve to the left..●upregulate the enzyme by shifting thecurve to the right.the enzyme by shifting theupregulatecurve to the left.Rate100-80-60-40-20-0-0Left Right-1235[Fructose 6-phosphate) (mm)

Phosphofructokinase I is the second enzyme that participates in glycolysis. It catalyses the…

Answered: 2. For the enzyme phosphofructokinase…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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5. How does the epinephrine hormone regulate glycogen catabolism in the liver and muscle? Please provide sequential steps involved in the regulation (inhibition or activation) of each enzyme in the form of a sketch.
The pentose phosphate shunt is likely to be active when: a AMP levels are high b the organism has not had a meal for a long time. c an organism is growing d fatty acid beta-oxidation is active.
am. 206.
1. A variation in the gene that codes for methylene tetrahydrofolate reductase: a. causes an increase in the synthesis of an enzyme involved in folate metabolism b. decreases the risk for developing neural tube defects and cardiovascular disease c. may increase an individual’s daily requirement for dietary folate d. changes an individual’s response to a diet high in polyunsaturated fatty acids 2. Which abilities will RDs need to work effectively in nutritional genomics (select all that apply)? - Business prowess - Counseling expertise - An understanding of genetics - Communication skills
10. The first reaction in glycolysis is the phosphorylation of glucose: Pi + Glucose → Glucose-6-phosphate This is a thermodynamically unfavorable process with AGº = +13.8 kJ/mol. In a liver cell at 37 °C the concentration of both phosphate and glucose are normally maintained at about 5 mM each. The equilibrium concentration of glucose-6-phosphate according to the above data is: A. 1.18 x107 B. 8.50 x 104 C. 4.25 x 105 D. 2.21 x 10s E. 1.38 x 108 F. 3.02 X 103 G. 6.75 x 10-6 H. 4.08 x 10 I. 9.15 x106
8. Indicate the number of moles each of the molecules below formed from running three moles of glucose through glycolysis and Krebs cycle Moles produced from two moles of glucose running through Glycolysis Moles produced from two moles of glucose being oxidized in the PDC/Krebs Cycle Molecule Produced ATP GTP NADH + H* FADH2 CO2 D Focus United States) W DE DELL F11 F12 F8 F9 F10 F6 FZ (8)
2. Consider the following reaction. What is the consequence of the increase of cytosolic CAMP concentration during the fight-or-flight response? Adenylyl cyclase ATP A. The inhibition of glycolysis B. The inhibition of the protein kinase A C. The breakdown of glycogen into glucose 1-phosphate D. The inhibition of the citric acid cycle E. The inhibition of the phosphofructokinase PPi CAMP
3. In your textbook the termi- nal enzyme catalyzing the ter- minal step of glycolysis is known as pyruvate kinase (PK). No indication is given that in mammalian tissues there are four different iso- forms of this enzyme. The four mammalian isoforms are known as PKL, PKR, PKM1 and PKM2. PKL is expressed in the liver, and PKR is ex- pressed in red blood cells. C PKM1 and PKM2 are derived from altemative splicing of the PKM gene. PKM1 is a constitu- tively active isoform expressed Active Site A PKM2 Monomer B Fructose-1,6-Bisphosphate N Phe, Ala, Ser Binding Site PKM2 Tetramer "Activator" Binding Site in differentiated cells from various tissues. In contrast, PKM2 has low basal activity and is activated by an effector molecule fructose 1,6-bisphosphate (FBP). PKM2 is expressed in most proliferating cells. In addition, the regulation of PKM2 pyruvate kinase activity plays an essential role in cancer metabolism and is crucial for the growth and survival of cancer cells. Recently, PKM2 has…
Describe the categories of enzyme control: (image provided) Allosteric control with example Covalent modification with example
2. Regarding the glycolysis metabolic pathways covered in class: A. In the EMP metabolic pathway, what chemical is catabolized to form pyruvate? (1 step away) B. There are two products of step 4 in the EMP pathway. If they were not phosphorylated, how would you describe these as monosaccharides (for example, an aldohexose and a ketopentose)? C. In the TCA Cycle, what chemical is produced by catabolism of isocitrate? (1 step away) D. Describe the major differences between primary, secondary and partial oxidation metabolism in terms of cell growth rate, (ii) oxygen consumption rate, and (iii) products formed.
Please handraw this graph with all the necessary detailed information: Imagine that I text enzyme rate for four different temperatures: 10 degrees celsius, 20 degrees celsisus, 30 degree celsius, and 40 degree celsius, in separate tubes. The enzyme appears to work faster as temperature increases, but completely ceases activity at 40 degrees celcius. Sketch a graph to show this outcome, but here you will graph product formation (nmoles/mL) vs. time (minutes). The graph should be 4 lines and HANDDRAWN. Include a legend if necessary. You do not need precise quantitivate values, but most show the correct trends on the graph.
2. Regarding the glycolysis metabolic pathways covered in class: A. In the EMP metabolic pathway, what chemical is produced by anabolism of pyruvate? (1 step away) B. There are two products of step 4 in the EMP pathway. If they were not phosphorylated, how would you describe these as monosaccharides (for example, an aldohexose and a ketopentose)? C. In the TCA Cycle, what chemical is produced by catabolism of isocitrate? (1 step away) D. Describe the major differences between primary, secondary and partial oxidation metabolism in terms of (i) cell growth rate, (ii) oxygen consumption rate, and (iii) products formed.

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