Chem Exam 3 Flashcards
Which of the following statements is not true regarding catalysts?
* Catalysts do not appear in the product of the reaction.
* Catalysts increase the rate of reaction.
* Catalysts are used up during the reaction.
* Catalysts lower the energy of activation of a process in relation to an uncatalyzed process.
Correct answer:
* Catalysts are used up during the reaction.
Which class of enzyme catalyzes a substitution reaction?
* Oxidoreductase
* Lyase
* Ligase
* Isomerase
* Transferase
* Hydrolase
- Transferase
Provide the reaction classification for the following transformation:
* REDOX
* Addition
* Elimination
* Isomerization
* Acid/Base
* Substitution
- Elimination
For the following reaction, provide the class of enzyme that would be needed to catalyze the process:
* isomerase
* oxidoreductase
* transferase
* lyase
* hydrolase
* ligase
- lyase
Provide the reaction classification for the following transformation (Note: R is an undefined carbon group; do not worry about what this group is):
* Elimination
* Addition
* Acid/Base
* REDOX
* Substitution
* Isomerization
- REDOX
For the following reaction, provide the class of enzyme that would be needed to catalyze the process (Note: R is an undefined carbon group; do not worry about what this group is):
* ligase
* transferase
* isomerase
* lyase
* oxidoreductase
* hydrolase
- oxidoreductase
Which of the following is not a characteristic of enzymes?
* Enzymes work by decreasing the rate of reaction of a chemical process.
* Enzymes are more efficient than chemical catalysts.
* Enzymes are typically specific for individual chemical processes.
* Enzymes are biological catalysts.
* Enzymes are regulated by changes in metabolic/environmental conditions.
- Enzymes work by decreasing the rate of reaction of a chemical process.
Which of the following is the purpose of a cofactor?
* Cofactors render an enzyme inactive and unable to promote enzymatic processes.
* Cofactors are proteins that promote enzymatic processes.
* Cofactors bind to enzymes to promote enzymatic processes.
* Cofactors are an enzymatic class that promote multiple types of enzymatic processes.
- Cofactors bind to enzymes to promote enzymatic processes.
What is the chemical formula for progesterone?
* C20H27O2
* C21H28O2
* C21H30O2
* C19H28O2
- C21H30O2
Dibucaine is a potent, long-acting local anesthetic. Identify the functional groups in dibucaine.
- Alkane
- hailde
- alcohol
- aldehyde
- ether
- ketone
- alkyne
- amine
- alkene
- carboxylic acid
- amide
- ester
- Alkane
- ether
- amine
- amide
Identify all major functional groups and ring systems for methotrexate:
* Carboxylic Acid
* pyrimidine
* pyrrole
* Ketone
* Alcohol
* Aldehyde
* naphthalene
* quinoline
* furan
* piperidine
* pyrrolidine
* Alkyne
* indole
* Halide
* Benzene
* Amide
* imidazole
* Ester
* piperazine
* Alkane
* Ether
* Alkene
* pyridine
* morpholine
* Amine
- Carboxylic Acid
- pyrimidine
- Benzene
- Amide
- Alkane
- Amine
Ativan is sedative drug used to treat anxiety and seizure disorders. From the structure given below, what class of drug compound would it belong?
* Barbiturate
* Morphine
* Penicillin
* Correct answer:
* Benzodiazepine
* Benzomorphan
- Benzodiazepine
Label the stereocenters in the following structure:
* R,Z
* S,Z
* S,E
* R,E
- R,Z
What are the correct stereochemical assignments?
* 1R, 3S
* 1S, 3R
* 1S, 3S
* 1R, 3R
- 1R, 3S
Calculate the molecular weight for the compound below:
* 368.48 g/mol
* 356.47 g/mol
* 344.46 g/mol
* 362.53 g/mol
- 356.47 g/mol
Label the stereocenters in the following compound:
* 1R, 5R
* 1R, 5S
* 1S, 5R
* 1S, 5S
- 1R, 5S
For the structure given below, provide the number of carbons in the parent chain and the total number of substituents. The carboxylic acid is the highest priority functional group.
- Parent Chain - 7, Substituents - 4
- Parent Chain - 6, Substituents - 4
- Parent Chain - 7, Substituents - 4
- Parent Chain - 6, Substituents - 5
- Parent Chain - 7, Substituents - 4
What is the general sugar classification for the following:
* D-ketopentose
* L-Aldopentose
* L-Ketopentose
* D-Aldopentose
- D-ketopentose
What is the relationship between the following sugar structures:
* Enantiomers
* Same sugar
* Epimers
* Anomers
- Epimers
What is the relationship between the following sugar structures:
* Enantiomers
* Same sugar
* Epimers
* Anomers
- Epimers
Determine the type of glycosidic bond in the following disaccharide:
* alpha 1,3
* alpha-1,4
* beta-1,4
* beta-1,3
- beta-1,4
Dolastin is a peptide isolated from the mollusk Dolabella auricularia that exhibits anticancer activity through the inhibition of tubulin polymerization. Given the structure of dolastin below, how many amino acid residues comprise the total peptide chain?
* 4
* 3
* 5
* 6
- 5
Which type of lipid would progesterone be classified as?
* Fatty Acid
* non-glyceride
* complex
* glyceride
- non-glyceride
Mefloquine is an antimalarial drug used in both prevention and treatment of malaria. From the structure given below, determine the chemical formula for Mefloquine:
- C17H14F6N2O
- C17H18F6N2O
- C16H15F6N2O
- C17H16F6N2O
- C17H16F6N2O
Mefloquine is an antimalarial drug used in both prevention and treatment of malaria. From the strereoisomer given below, assign the two stereocenters as either R or S.
- 1R, 2R
- 1S, 2R
- 1R, 2S
- 1S, 2S
- 1S, 2R
- 1S, 2R
The following disaccharide is found as a repeating unit in a much larger polysaccharide formed by Bacteroides vulgatus, a common bacterium species located in the gut microbiota. Classify the glycosidic bond in the disaccharide:
* beta-1,4
* alpha-1,3
* beta-1,3
* alpha-1,4
- alpha-1,3
Met-enkephalin is a naturally occurring peptide found in the brain which binds to various opioid receptors. From the structure given below, how many amino acid residues make up met-enkephalin:
* 7
* 6
* 4
* 5
- 5
What type of peptide would you categorize carnosine?
* dipeptide
* tetrapeptide
* polypeptide
* tripeptide
- dipeptide
What kind of isomers are ephedrine and pseudoephedrine?
* Diastereomers
* Enantiomers
* Conformational
* Constitutional
- Diastereomers
