### The Various Forms of Vitamin K**Multiple Choice Question:**- **Functions as cofactors for enzymes with a key role in blood coagulation**- **Functions as cofactors in the blood coagulation pathway, and as chemical antioxidants**- **Have different functions; one form is an enzyme cofactor, and another is a potent antioxidant**- **All serve as antioxidants**This text is designed to assess understanding of the various functions of vitamin K forms in biological processes. Vitamin K is essential in blood coagulation and certain forms have antioxidant properties. Choose the correct statement that accurately describes the roles of different forms of vitamin K.

Vitamin K is a fat soluble vitamin. This vitamin was originally identified for its role in the…

Answered: The various forms of vitamin K Function…

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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Regarding cardiovascular disease, match each tern A condition marked by edema of the lungs and shortness of breath, especially when lying down A lesion often seen on the retinal surface (in the eye) of people with diabetes and/or hypertension A triglyceride produced in the liver in response to a high carbohydrate diet that increases chronic disease risk A macrophage that has become engorged with indigestible lipid molecules, leading to inflammation [Choose ] [Choose ] [Choose ] [Choose ] the phrase best describes it
A mutation of Lysine 82 (in the DPG-binding pocket) to Arginine in beta sub-unit will most likely result in Not enough information Higher than normal binding affinity to oxygen Lower than normal binding affinity to oxygen Normal binding to oxygen
Lantus (Insulin glargine) A patient takes 50 U insulin a day. How many insulin vials do you need for a 90 day supply?
Carbon monoxide competes with 02 binding by hemoglobin, and exposure can lead to toxicity. Could carbon monoxide be considered an allosteric effector? No since the it competes for the active site of the molecule O Yes because it will reduce 02 binding O Yes since the it competes for the active site of the molecule O No because it will reduce 02 binding and is a negative effector
Digoxin, a toxin derived from the foxglove (shown), can be used to treat heart disorders such as atrial fibrillation. Digoxin's mechanism of action is to Inhibit the Na+/K+ ATPase. Which of the following is the most likely side effect of Digoxin treatment? Failure to transport glucose into cells during an extended fast O Failure to transport glucose into cells after after eating a large meal O Enhanced response of muscle cells to Acetylcholine O Failure to transport Cl" out of the cell using direct active transport
It has been shown recently that the African naked GLUT5-O Fructose mole-rat can withstand up to 18 min of complete anoxia (ab- sence of O2) in the presence of high levels of CO2 without ap- parent brain damage. The basis of its capacity to tolerate such unusual conditions is that the brain, heart, and liver in the mole- rat switch to fructose-driven glycolysis. In contrast to normal mice, these tissues in the naked mole-rat have high levels of GLUT5 specific for cellular uptake of fructose. The available pathways for breakdown of fruct ose for metabolic energy production are shown on the right. KHK stands for ketohexosekinase, an enzyme that is markedly upregulated in the mole-rat compared to normal mice. Conse- quently mice must metabolize fructose largely via hexokinase (HK). In the diagram ALDOB, ALDOA, etc. represent aldolase isozymes. KHK HK Fructose-6-P PFK Fructose-1-P Fructose-1,6-BP ALDOB ALDOC ALDOA ALDOC Glyceraldehyde DHAP GAЗP Glyc-3-P 3-PGA Lactate Pyruvate mouse naked…

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