Part : Mlipie Choice y- pts eacn 1. Which of the following statements describes
ID: 542210 • Letter: P
Question
Part : Mlipie Choice y- pts eacn 1. Which of the following statements describes an apoenzyme? a) the place where a substrate binds b) an apoenzyme is an organic molecule that an enzyme needs to function correctly c) an apoenzyme is an enzyme that does not have its cofactor and therefore is not functioning d) it describes a theory on how substrates and enzymes interact. 2. Which of the following could properly be best described as a cosubstrate? a) Zn2 b) NADH c) a heme d) all of these are correct 3. Myoglobin and hemoglobin do not share which of the following: (Circle all that apply) a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure 4. What would the name of an enzyme that catalyzes the following reaction be: a) fructose-6-phosphate dehydrogenase b) fructose-6-phosphate isomerase fructose-6-phosphate + ATP fructose-2,6-bisphosphate + ADP c) fructose-6-phosphate ligase d) fructose-6-phosphate kinase 5. In the T state of hemoglobin the heme is because it bound to oxygen. a) planar, is b) puckered, is c) planar, is not d) puckered, is not 6. Which of these amino acid groups would not make a good nucleophilic catalyst? d) methyl c) imidazole a) amino b) sulfhydryl 7. Vmax is defined as 15 KM+IS a) k2*ET c) b) k-1tka 2 Kp 8. Which of the following statements is true? a) As you increase the concentration of substrate a competitive inhibitor is less effective. b) As you increase the concentration of substrate a competitive inhibitor is more effective. c) As you increase the concentration of substrate an uncompetitive inhibitor is less effective d) As you increase the concentration of substrate an uncompetitive inhibitor is more effectivExplanation / Answer
ANSWER'S
1) c.an apoenzyme is an enzyme that does not have its cofactor and therefore is not functioning.
Explanation:
enzyme without its cofactor (eg.Fe,Zn,Mg...) is called apoenzyme.
2) b.NADH
Explanation:
Compound which inovolve Redox reaction with cyclic regenaration is called cosubstrate.In given option NADH invole electron transfer reaction with regenaration manner.so it is best answer.
3.d.Quary structureatern
Explanation
Hemoglobin have 4 sub unit(alpha&beta)
myoglobin have only one sub unit
so myoglobin doesnot have any Quary structure at all.this is main different Hb and Mb.
4.d.fructose- 6 -phosphate kinase
Explanation:
fructose- 6 -phosphate kinase it also called PFK.it is most important regulatory enzyme in glycolysis.
5.c.puckered, is not.
T state is mean tense,deoxy Hb globin said to be T state.
6.d.methyl
7.a.k2*E
8.b.