Diastereomeric Isomers Quiz

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Questions and Answers

Which type of salts are formed from strong acids with strong bases?

  • Moderate Weak Acids
  • Cyclic amides
  • Low-molecular weight salts
  • Highly dissociable salts (correct)

In terms of water solubility, what happens when a salt is formed by a weak acid and a weak base?

  • It increases the water solubility of a drug
  • It separates easily in water
  • It does not dissociate appreciably (correct)
  • It becomes highly water soluble

What are characteristics of low-molecular weight salts in terms of water solubility?

  • They are water soluble (correct)
  • They are highly dissociable
  • They are cyclic esters
  • They are water insoluble

How many ionizable functional groups does Tyrosine contain?

<p>3 (B)</p> Signup and view all the answers

Which type of group in Tyrosine is ionizable based on the pH of the environment?

<p>Alkylamine and carb acid groups (B)</p> Signup and view all the answers

What is the pKa range for the ionizable phenolic hydroxyl group in Tyrosine?

<p>9-10 (A)</p> Signup and view all the answers

Which type of cyclic compound is a lactone?

<p>Cyclic ester (C)</p> Signup and view all the answers

What compound is formed by the reaction between HBr and potassium hydroxide (KOH)?

<p>(KBr) Potassium Bromide (C)</p> Signup and view all the answers

Which type of isomers are formed due to restricted bond rotation of C=C and similar systems like imines?

<p>Geometric isomers (D)</p> Signup and view all the answers

What is the more active isomer of triprolidine, indicating a critical distance between the pyridine and pyrrolidine rings for binding to the receptor?

<p>E-isomer (B)</p> Signup and view all the answers

In the context of diastereomers of 1,2-dimethylcyclohexane, what allows for the possibility of conformational isomers?

<p>Significant conformational freedom (B)</p> Signup and view all the answers

What is the purpose of structure activity relationship (SAR) in drug development?

<p>To analyze a large set of drug analogs and determine patterns leading to stronger interactions (A)</p> Signup and view all the answers

Which type of isomers exhibit significantly different biological activity when the first 2 cyclohexane rings are fused into different configurations?

<p>Steroids (D)</p> Signup and view all the answers

What is the main purpose of developing an activity pattern from a large set of drugs?

<p>To predict the activity of a new drug (D)</p> Signup and view all the answers

What does functional activity at receptors involve?

<p>Recognition or binding between drug and macromolecular receptors (D)</p> Signup and view all the answers

What is the process of modifying functional groups of a lead compound to improve its recognition, affinity, and pharmacokinetic properties?

<p>Lead optimization (C)</p> Signup and view all the answers

How can interactions between drugs and biological systems be modeled?

<p>Using computational chemistry (B)</p> Signup and view all the answers

Where was salicylic acid originally isolated from, leading to its eventual use in treating inflammatory ailments?

<p>Willow trees' bark (C)</p> Signup and view all the answers

Which statement best describes structure activity relationship (SAR)?

<p>A pattern developed by chemists to help explain drug action based on known knowledge (C)</p> Signup and view all the answers

What does the text suggest about the accuracy of models based on current knowledge?

<p>They are subject to limitations and may become inaccurate with new data points (C)</p> Signup and view all the answers

Why is the interaction between drugs and biological systems described as simply recognition or binding?

<p>To highlight the straightforward nature of drug interactions (B)</p> Signup and view all the answers

'All models have limitations' implies that:

<p>'All models' may not accurately represent reality (A)</p> Signup and view all the answers

What is the major pathway for the metabolism of thioesters?

<p>S-dealkylation to hemithioacetals (D)</p> Signup and view all the answers

How is codeine metabolized?

<p>O-demethylation to morphine (B)</p> Signup and view all the answers

What is the result of P450-catalyzed oxidative dehydrohalogenation?

<p>Formation of gem-halohydrin (B)</p> Signup and view all the answers

How does Sevoflurane primarily undergo metabolism?

<p>O-dealkylation to hexafluoroisopropanol (A)</p> Signup and view all the answers

What is the role of azoreductase in liver microsomes?

<p>Reduction of azo compounds to primary amines (D)</p> Signup and view all the answers

What does the oxidative O-dealkylation of ethers resemble in terms of mechanism?

<p>N-alkylation (B)</p> Signup and view all the answers

Which compound is demethylated to yield the anticancer drug 6-mercaptopurine?

<p>$6$-methylthiopurine (D)</p> Signup and view all the answers

What do reactive metabolites like acyl halides and carbonyl halides generated in metabolism reactions do?

<p>React with H2O to form carboxylic acids (D)</p> Signup and view all the answers

Which enzyme is responsible for catalyzing the N-acetylation of arylamines?

<p>N-acetyltransferase (NAT1 and NAT2) (D)</p> Signup and view all the answers

What is the protective mechanism against hepatotoxicity or carcinogenicity that involves detoxifying harmful substances through glutathione conjugation?

<p>Mercapturic acid pathway (D)</p> Signup and view all the answers

Which enzyme catalyzes the conjugation of electrophiles with GSH for excretion in bile and urine, playing a role in detoxification?

<p>Glutathione S-transferase (GST) (D)</p> Signup and view all the answers

In drug metabolism, which process involves the transfer of methyl groups to substrates for their inactivation?

<p>Methylation (A)</p> Signup and view all the answers

Which organ is described as the primary site for drug metabolism and elimination?

<p>Liver (A)</p> Signup and view all the answers

What can age-related changes in elderly individuals lead to concerning drug metabolism?

<p>Impaired drug metabolism (B)</p> Signup and view all the answers

How does pregnancy influence hepatic drug metabolism?

<p>By affecting the activity of specific enzymes like CYP3A4, 2A6, 2D6, and 2C9 (B)</p> Signup and view all the answers

What can genetic polymorphisms in drug-metabolizing enzymes lead to?

<p>Differences in drug metabolism rates, affecting drug efficacy and toxicity (C)</p> Signup and view all the answers

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