𝑬𝒏𝒄𝒚𝒄𝒍𝒐𝒑𝒆𝒅𝒊𝒂 𝒐𝒇 𝑷𝒉𝒂𝒓𝒎𝒂𝒄𝒚 𝑆t 4

قريت أسئلة أكثر من الماده بس لا اتيه باجر

هاي بعض من اسئلة المد لجامعة المستنصرية منشورة في احدى القنوات

اعيد واكرر لا ترحون للامتحان اذا ماتحلون هاي الاسئلة

وهذا الحل

ماكو تسريب روحو راجعو مادتكم و نامو

ماكو تسريب منا منا

شباب منو من الجامعة الاسلامية @D_M_A_L

تم بحد ﷲ 🧡

لهنا نكون وصلنا لختام حلقتنا لهاي المادة و ان شاء ﷲ ما اكون قصرت وياكم أتمنى ال نجاح و التوفيق للجميع و الي يا رب 🌸

✏️What does the term "regioselectivity" primarily describe in the context of metabolism? a) The selective synthesis of new functional groups. b) The selective metabolism of two or more similar functional groups or atoms in different regions of a molecule. c) The random breakdown of all functional groups within a molecule. d) The non-selective binding of enzymes to a substrate. ✒️Which of the following scenarios is an example of regioselectivity? a) An enzyme breaking down a molecule into two identical halves. b) A drug metabolizing only the nitrogen atoms in a compound. c) Of four identical methoxy groups in papaverine, only the 4-OCH3 group undergoing O-demethylation. d) All hydroxyl groups in a molecule being equally oxidized. ✏️ what happened to the 4-OCH3 group in papaverine as an example of regioselectivity? a) It was hydroxylated. b) It was reduced to an alcohol. c) It underwent O-demethylation. d) It was oxidized to a carboxylic acid. 🖊️The provided example of papaverine illustrates that regioselectivity can occur with which type of functional group? a) Hydroxyl (OH) groups b) Nitro (NO2) groups c) Methoxy (OCH3) groups d) Carbonyl (C=O) groups ✏️If a metabolic process is described as "regioselective," what does this imply about the outcome? a) All possible reaction sites will be equally affected. b) Only one specific type of functional group will be metabolized, regardless of its position. c) There will be a preference for metabolizing a particular functional group or atom at a specific location within the molecule. d) The metabolism will be random and unpredictable. 1/ b 2/ c 3/ c 4/c 5/c

🌸Which of the following statements is TRUE regarding the metabolism of propranolol enantiomers? a) The (-) enantiomer of propranolol undergoes more rapid metabolism. b) Both (+) and (-) enantiomers of propranolol are metabolized at the same rate. c) The (+) enantiomer of propranolol undergoes more rapid metabolism. d) Propranolol enantiomers do not exhibit differences in metabolic rates. 🌼What is the primary metabolic pathway for the (S)(-)-isomer of warfarin? a) Keto reduction b) Glucuronidation c) 7-hydroxylation (aromatic hydroxylation) d) N-demethylation 🌸The (R)(+)-isomer of warfarin primarily undergoes which metabolic transformation? a) Aromatic hydroxylation b) Keto reduction c) Dealkylation d) Oxidation 🌼What is the major plasma metabolite of the (R)(+)-isomer of warfarin? a) (S,R) warfarin acid b) (R,S) warfarin alcohol c) 7-hydroxywarfarin d) Warfarin glucuronide 🌸what can be concluded about the metabolic profiles of enantiomers? a) Enantiomers always have identical metabolic profiles. b) Enantiomers may exhibit dramatic differences in their metabolic profiles. c) Metabolic differences between enantiomers are negligible. d) Only a single enantiomer of a chiral drug is typically metabolized. 1/c 2/c 3/b 4/b 5/ b

🌵Which of the following molecules is least likely to be directly attached to a compound by a conjugative enzyme in a phase II metabolic reaction aimed at increasing water solubility for excretion? A. Glucuronic acid B. Glycine C. Sulfate D. Glutamine E. Methyl E. Methylالجواب

🌿What distinguishes GSH conjugation from other conjugative phase II reactions ? a) It requires the formation of an activated coenzyme. b) It requires the initial formation of an activated substrate. c) It relies on the inherent reactivity of nucleophilic GSH towards an electrophilic substrate, without requiring an activated coenzyme or substrate. d) It has a weaker driving force compared to other phase II reactions. الجواب C

💊When Benzoic Acid undergoes glycine conjugation, what is the resulting product? a) Benzoic Acid b) Hippuric Acid c) Salicyluric Acid d) Glycine

🌸What is the major urinary metabolite of acetaminophen in adults? a) O-sulfate conjugate b) O-glucuronide conjugate c) N-acetyl-p-benzoquinone imine (NAPQI) d) Cysteine conjugate 🌼 In neonates and young children (ages 3-9 years), what is the major route of acetaminophen conjugation? a) Glucuronidation b) Sulfation c) Oxidation d) Reduction 🌸 Why do neonates and young children have a decreased glucuronidating capacity? a) Increased levels of glucuronyltransferases b) Undeveloped glucuronyltransferases or low levels of these enzymes c) Enhanced sulfate conjugation d) Higher metabolic rate 🌼For phenols, glucuronidation is often a competing reaction to what other process? a) Oxidation b) Reduction c) Sulfation d) Hydrolysis

صباحكم خير 🌼

﴿وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌ﴾.