Q&A Hero

Q: Consider a mixture of the amino acids lysine (pI = 9.7), tyrosine (pI = 5.7), and glutamic acid (pI = 3.2) at a pH 5.7 that is subjected to an electric current. ________ will remain stationary. A) Lysine B) Tyrosine C) Glutamic acid D) All of the amino acids

Q: Consider a mixture of the amino acids lysine (pI = 9.7), tyrosine (pI = 5.7), and glutamic acid (pI = 3.2) at a pH 5.7 that is subjected to an electric current. ________ will migrate towards the positive electrode(+). A) Lysine B) Tyrosine C) Glutamic acid D) All of the amino acids

Q: What is the structural formula of glutamic acid (pI = 3.2) at pH = 1? A) B) C) D) E)

Q: At a pH < 5, the zwitterion for alanine (pI = 6) will have A) a net positive charge. B) a net negative charge. C) an overall charge of zero. D) low solubility in water. E) a negative charge on the carboxyl group.

Q: At a pH > 9, the zwitterion of glycine (pI=6.0) will have A) a net positive charge. B) a net negative charge. C) an overall charge of zero. D) low solubility in water. E) a negative charge on the nitrogen.

Q: A basic amino acid has an R group that contains A) an amine group. B) a carboxyl group. C) a methyl group. D) an alcohol group. E) a thiol group.

Q: The side chain for histidine is classified as a ________ R group. A) basic B) neutral C) acidic D) nonpolar E) polar

Q: Glycine is the only naturally occurring amino acid that is A) negatively charged. B) positively charged. C) neutral. D) in the L- form. E) achiral.

Q: A completely vegetarian diet will contain all the essential amino acids if it includes A) wheat and rice. B) rice and beans. C) almonds and walnuts. D) corn and beans. E) wheat and corn.

Q: Methionine is an amino acid that contains A) a sulfur atom. B) a chlorine atom. C) a sodium atom. D) a phenyl ring. E) a heterocyclic ring.

Q: Amino acids that are not synthesized in the body and must be obtained from the diet are called A) essential. B) polar. C) nonpolar. D) complete. E) incomplete.

Q: Which of the following would be most likely to be deficient in at least one essential amino acid? A) eggs B) milk C) beans D) steak E) ham

Q: The following amino acid R group chain is - C HCH3 | CH3 A) polar. B) hydrophobic. C) hydrophilic. D) acidic. E) basic.

Q: The structural formulas of amino acids are the same EXCEPT for the A) carboxyl group. B) alpha carbon. C) amino group. D) side (R) group. E) hydrogen bonding.

Q: Sucrase, the protein that facilitates the hydrolysis of sucrose, would be classified as a ________ protein. A) transport B) hormonal C) catalytic D) structural E) contractile

Q: Wool is primarily made up of A) protein. B) carbohydrate. C) globin. D) triacylglycerols. E) enkephalin.

Q: Collagen, a protein found in tendons and cartilage, would be classified as a ________ protein. A) catalytic B) structural C) transport D) storage E) hormone

Q: Which of the following is NOT a function of proteins? A) provide structural components B) stores the genetic information of a living organism C) movement of muscles D) catalyze reactions in the cells E) transport substances through the bloodstream

Q: Aniline is the IUPAC approved name for aminobenzene.

Q: In response to allergic reactions or injury to cells, the body increases the production of A) diphenhydramine. B) antihistamine. C) histamine. D) epinephrine. E) dopamine.

Q: A deficiency of which amine is responsible for the signs and symptoms of Parkinson's disease? A) histamine B) dopamine C) epinephrine D) diphenhydramine E) methedrine

Q: A neurotransmitter A) transmits neurons. B) transmits neutrons. C) transmits a nerve impulse. D) signals loss of appetite. E) transmits ideas from person to person.

Q: Which of the following is NOT a neurotransmitter? A) histamine B) epinephrine C) glutamate D) pyridine E) serotonin

Q: What pharmacologically active amine is responsible for the signs and symptoms encountered in an allergic reaction? A) histamine B) epinephrine C) diphenhydramine D) phenylephrine E) dopamine

Q: With the correct choice of acid, the product(s) of the acid hydrolysis of N-methylbenzamide could be A) formic acid and aniline. B) methanol and benzoic acid. C) benzoic acid and ethylamine. D) benzoic acid and methylammonium chloride. E) formic acid, phenol, and ammonia.

Q: With the correct choice of acid, acid hydrolysis of acetamide could produce A) acetic acid and ammonium chloride. B) acetic acid and methylamine. C) ethanol and ammonia. D) acetaldehyde and ammonium hydroxide. E) formic acid and ethylamine.

Q: Which of the following is the reaction for the base hydrolysis of N-ethylformamide?

Q: Which of the following is the reaction for the acid hydrolysis of N-methylacetamide?

Q: Amides having fewer than ________ carbons are generally water soluble. A) five B) six C) ten D) eleven E) twelve

Q: What is the chemical classification of the barbiturate sedatives? A) cyclic amides B) cyclic ethers C) cyclic amines D) cyclic esters E) cyclic acids

Q: What kind of compound is urea? A) ester B) acid C) amide D) ketone E) amine

Q: Amides are derivatives of ________ and ________. A) amines; esters B) amines; carboxylic acids C) alkanes; amines D) carboxylic acids; alcohols E) alcohols; carboxylic acids

Q: Which chemical class does phenobarbital belong to? A) ester B) amine C) amide D) alkane E) ether

Q: The reaction of butanoic acid and dimethylamine gives A) N-methylbutanamide. B) N-ethylbutanamide. C) N,N-dimethylbutanamide. D) N,N-methylbutanamine. E) N-methylbutanamine.

Q: In the formation of N-ethylacetamide, the reactant(s) is(are) A) acetic acid and dimethylamine. B) diethylamine. C) acetamide and ethanol. D) acetic acid and ethylamine. E) ethanol and ethylamine.

Q: One name for this compound isA) N-ethylpropanamide.B) N-ethylacetamide.C) pentanamide.D) N,N-diethylacetamide.E) ethylpropionamide.

Q: What is the name of this compound? A) 1-ethylbenzamide B) N,N-dimethylbenzamide C) 2-ethylbenzamide D) N-ethylbenzamide E) ethylaminobenzoic acid

Q: What is the major functional group in the following compound?A) ketoneB) carboxylic acidC) esterD) amineE) amide

Q: When acetic acid reacts with ammonia, NH3, the reaction called amidation yields A) acetamine. B) ammonium acetate. C) ethylammonium hydroxide. D) amino acetate. E) acetamide.

Q: The amide formed in the reaction of benzoic acid and ethylamine is A) B) C) D) E)

Q: Cyclic compounds that contain a nitrogen atom are called A) carbocyclic compounds. B) aromatic compounds. C) heterocyclic compounds. D) homocyclic compounds.

Q: What functional group is always found in alkaloids (such as caffeine, nicotine, and digitalis)? A) amide B) acid C) ether D) amine E) ester

Q: Which of the following is NOT an alkaloid? A) nicotine B) caffeine C) diethylamine D) quinine E) cocaine

Q: Physiologically active nitrogen-containing compounds produced by plants are called A) aromatics. B) alkaloids. C) esters. D) polymers. E) ethers.

Q: Procaine and Lidocaine were developed by modifying the structure of A) cocaine. B) nicotine. C) harmaline. D) meperidine. E) caffeine.

Q: Nicotine, coniine, quinine, atropine, and morphine are all examples of A) ethers. B) esters. C) carboxylic acids. D) alkaloids. E) amides.

Q: Among the choices below, identify the heterocyclic amine found in DNA. A) piperidine B) pyridine C) pyrrole D) purine E) imidazole

Q: Identify the heterocyclic amine in the choices below. A) diphenhydramine B) pyrrolidine C) adrenaline D) methylamine E) cholesterol

Q: What are alkaloids? A) physiologically active nitrogen compounds derived from plants B) anesthetics found in plants C) flavoring agents found in fruits and vegetables D) preservatives found in animal tissue E) natural steroids

Q: What kind of pharmacologic activity is found in the amines Procaine and Lidocaine? A) stimulant B) anesthetic C) local anesthetic D) disinfectant E) fungicide

Q: In what form are amine-containing drugs often administered? A) free base B) sodium salt C) ammonium salt D) water solution E) oil solution

Q: Choline is a quaternary ammonium compound with a ________ charge on the nitrogen. A) positive B) negative C) zero D) neutral E) double

Q: The odor of an amine can be neutralized with A) water. B) acids. C) bases. D) detergents. E) solvents.

Q: Which of the following is NOT an alkaloid? A) nicotine B) caffeine C) diethylamine D) quinine E) cocaine

Q: Physiologically active nitrogen-containing compounds produced by plants are called A) aromatics. B) alkaloids. C) esters. D) polymers. E) ethers.

Q: Procaine and Lidocaine were developed by modifying the structure of A) cocaine. B) nicotine. C) harmaline. D) meperidine. E) caffeine.

Q: Nicotine, coniine, quinine, atropine, and morphine are all examples of A) ethers. B) esters. C) carboxylic acids. D) alkaloids. E) amides.

Q: Among the choices below, identify the heterocyclic amine found in DNA. A) piperidine B) pyridine C) pyrrole D) purine E) imidazole

Q: Identify the heterocyclic amine in the choices below. A) diphenhydramine B) pyrrolidine C) adrenaline D) methylamine E) cholesterol

Q: What are alkaloids? A) physiologically active nitrogen compounds derived from plants B) anesthetics found in plants C) flavoring agents found in fruits and vegetables D) preservatives found in animal tissue E) natural steroids

Q: What kind of pharmacologic activity is found in the amines Procaine and Lidocaine? A) stimulant B) anesthetic C) local anesthetic D) disinfectant E) fungicide

Q: In what form are amine-containing drugs often administered? A) free base B) sodium salt C) ammonium salt D) water solution E) oil solution

Q: Choline is a quaternary ammonium compound with a ________ charge on the nitrogen. A) positive B) negative C) zero D) neutral E) double

Q: The odor of an amine can be neutralized with A) water. B) acids. C) bases. D) detergents. E) solvents.

Q: Amines are A) Bronsted-Lowry bases. B) Bronsted-Lowry acids. C) neutral in water solution. D) unreactive.

Q: What kind of amine can NOT form hydrogen bonds? A) primary B) secondary C) tertiary D) aromatic E) substituted

Q: Amines can form ________ bonds with other molecules. A) oxygen B) hydrogen C) nonpolar D) metallic E) triple

Q: What relation does the boiling point of an amine have to a similar hydrocarbon? A) higher B) lower C) very similar

Q: Diethylamine and HCl react to produce A) diethyl chloride. B) diethylammonium chloride. C) ethylammonium chloride. D) ammonium chloride. E) butylammonium chloride.

Q: When ethylamine dissolves in water, a solution of ________ is produced. A) ammonia B) ethylammonium hydroxide C) ethylamine D) ethylhydroxide E) ethylhydroxylate

Q: Which of the following represents the complete neutralization of N,N-dimethylamine?

Q: Which of the following compounds CANNOT form hydrogen bonds with water? A) (CH3 - CH2)2NH B) CH3 - CH2 - OH C) (CH3 - CH2)3N D) CH3 - CH2 - NH2 E) All of the compounds above are capable of forming hydrogen bonds with water.

Q: Which of the following compounds CANNOT form hydrogen bonds with water?A) CH3 - CH2 - CH3B) CH3 - CH2 - OHC) D) E) CH3 - CH2 - NH2

Q: What is the IUPAC name of the following compound? A) propyl amine B) butyl amine C) amine butane D) 1-aminobutane E) 1-aminopropane

Q: What is the common name of the following compound? A) ethyl propyl amine B) diethyl amine C) trimethyl amine D) propyl amino E) dipropyl amine

Q: How many alkyl substituents does N-ethyl-N-methylaniline have? A) one B) two C) three D) eight E) none

Q: What prefix is used to show that a small alkyl group is attached to the nitrogen of aniline and not to the aromatic ring? A) N- B) C- C) Roman numerals D) Greek letters E) iso-

Q: Aniline is a(n) A) primary aromatic amine. B) secondary aromatic amine. C) heterocyclic amine. D) aliphatic amine. E) tertiary amine.

Q: When naming amines according to the IUPAC system, the -e in the corresponding alkane is replaced with A) -amide. B) -amine. C) -ine. D) -ide. E) -ane.

Q: In what kind of amine is the nitrogen directly bonded to two carbon atoms? A) primary B) secondary C) tertiary D) quaternary E) amide