the beta lactam ring found in penicillin and penicillin derivative . how is this region of...
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Answer
In antibiotic resistance of the gram positive bacteria, they start producing beta lactamase enzyme which breaks the beta lactam ring of the penicillin. This beta lactam ring possess antibiotic property for killing the bacteria. These rings interefere in formation of cell wall of the bacteria. Hence defective cell walls are formed and bacteria gets died.
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beta lactam ring found in penicillin and penicillin derivative .
how is this region of...
What class of drugs inhibits cell wall synthesis by using a β-lactam ring? Penicillin Sulfas Aminoglycosides...
What class of drugs inhibits cell wall synthesis by using a β-lactam ring? Penicillin Sulfas Aminoglycosides Tetracyclines
1.a. Methicillin (a Beta-lactamase resistant penicillin) resistance in Staphylococcus aureus results from which of the following...
1.a. Methicillin (a Beta-lactamase resistant penicillin) resistance in Staphylococcus aureus results from which of the following mechanisms? a. increased expression of drug efflux pumps b. the acquisition and expression of a new type of penicillin binding protein c. changes in D-ala-D-ala amino acids found in peptidoglycan d. increased peptidoglycan biosynthesis 1.b. PBP2a confers resistance to beta-lactam antibiotics because it: a. has a low affinity for nearly all beta-lactams b. alters the D-ala-D-ala amino acids in peptidoglycan c. degrades both penicillins...
5. Beta-lactam antibiotics are the major antibiotics. Where they act? Name two different types of antibiotics...
5. Beta-lactam antibiotics are the major antibiotics. Where they act? Name two different types of antibiotics which fall in this category. Explain where they resemble and where they differ. 6. Penicillin and Tetracycline; which one is narrow spectrum and which one is broad spectrum and why-explain. 7. There are two types of antibiotics which act on membrane. Name one member of each type. Why one antibiotics of this group exclusive works on fungus/protists and not on bacteria. 8. Many antibiotics...
This question is referring to a glucose ring structure How does ring closure affect structural variability?...
This question is referring to a glucose ring structure How does ring closure affect structural variability? That is, can the ring form of glucose have as many different structural shapes as the chain form of glucose? Is this 6-member glucose ring actually flat (planar)? Why/why not? Where is the carbonyl group in the glucose ring? Can you convert the ring to the chain without breaking bonds? How many carboxyl groups are in this molecule? How many dissociable groups? Could you...
2. Not only does an aromatic ring itself affect the reactivity of an acid derivative (an ester, o...
2. Not only does an aromatic ring itself affect the reactivity of an acid derivative (an ester, on last year's quiz), substituents on the aromatic ring can further modify the reactivity. First, we will consider a phenyl amide with a para-acetyl substituent: CH, (a) What is the n-effect (resonance) of the para-acetyl substituent? How will that affect the reactivity of the other (amide) carbonyl in the molecule below (increase or decrease, compared to the same amide but with no p-...
2. A middle-aged man presents to the emergency room with chest pain and is found to...
2. A middle-aged man presents to the emergency room with chest pain and is found to have suffered a heart attack. He has a past history of hypertension, non-insulin-dependent diabetes mellitus (NIDDM), and high cholesterol. Medical evaluation suggested the need for a triple bypass procedure. This is performed on the fifth day of his hospital stay. During recovery, he develops septic shock with fever and pneumonia. Gram-positive cocci in clusters, isolated from both his lungs (via sputum) and the surgical...
How many hydrogen bonds are found in this region of the secondary structure identified? Keep in...
How many hydrogen bonds are found in this region of
the secondary structure identified? Keep in mind this is a alpha
helix so hydrogen bonding occurs every 4th amino acid residue. It
says the answer to this 10. 2 but I don't see how. Could you
explain to me how you solve this and why that is the answer? Then,
I will rate :)
How many Hydrogen bonds found in this region of secondary structure?
1. What are the similarity and differences between the two graphs? 2. Does this data support...
1. What are the similarity and differences between the two
graphs?
2. Does this data support the hypothesis that some reaistance
genes evolved in bacteria that werent exposed to modern
antibiotics? Why or Why Not?
3. Did any antibiotics affect gram-positive and gram- negative
strains very differently? What is a possible explanaition for
this?
4. Do the results of this study give us any insights into how
we might combat antibiotic resistance going foward? If so,
what?
Origins of Antibiotic...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c)...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
5. Beta-lactam antibiotics are the major antibiotics. Where they act? Name two different types of antibiotics which fall in this category. Explain where they resemble and where they differ. 6. Penicillin and Tetracycline; which one is narrow spectrum and which one is broad spectrum and why-explain. 7. There are two types of antibiotics which act on membrane. Name one member of each type. Why one antibiotics of this group exclusive works on fungus/protists and not on bacteria. 8. Many antibiotics...
2. Not only does an aromatic ring itself affect the reactivity of an acid derivative (an ester, on last year's quiz), substituents on the aromatic ring can further modify the reactivity. First, we will consider a phenyl amide with a para-acetyl substituent: CH, (a) What is the n-effect (resonance) of the para-acetyl substituent? How will that affect the reactivity of the other (amide) carbonyl in the molecule below (increase or decrease, compared to the same amide but with no p-...
2. A middle-aged man presents to the emergency room with chest pain and is found to have suffered a heart attack. He has a past history of hypertension, non-insulin-dependent diabetes mellitus (NIDDM), and high cholesterol. Medical evaluation suggested the need for a triple bypass procedure. This is performed on the fifth day of his hospital stay. During recovery, he develops septic shock with fever and pneumonia. Gram-positive cocci in clusters, isolated from both his lungs (via sputum) and the surgical...
How many hydrogen bonds are found in this region of
the secondary structure identified? Keep in mind this is a alpha
helix so hydrogen bonding occurs every 4th amino acid residue. It
says the answer to this 10. 2 but I don't see how. Could you
explain to me how you solve this and why that is the answer? Then,
I will rate :)
How many Hydrogen bonds found in this region of secondary structure?
1. What are the similarity and differences between the two
graphs?
2. Does this data support the hypothesis that some reaistance
genes evolved in bacteria that werent exposed to modern
antibiotics? Why or Why Not?
3. Did any antibiotics affect gram-positive and gram- negative
strains very differently? What is a possible explanaition for
this?
4. Do the results of this study give us any insights into how
we might combat antibiotic resistance going foward? If so,
what?
Origins of Antibiotic...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
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