Bio Chem - Exam 2 Flashcards

How is ethanol metabolizes in the liver?

a. Ethanol is metabolized by a series of oxidation reactions to produce carbon dioxide and water

b. Ethanol is metabolizes by a series of reduction reactions to produce ethane gas

c. Ethanol is not metabolized, but rather it is excreted as a poison by the kidneys

d. Ethanol is metabolized by a series of oxidation reactions to procure lactic acid and water

Select the compound containing the alkyne functional group.

a. compound III

b. compound IV

c. compound I

d. compound II

The following molecules is a __________ amine.

a. This molecule is not an amine

b. primary

c. secondary

d. tertiary

Which statement BEST describes the following reaction?

a. In this reaction, ethanol is reduced and NAD⁺ is oxidized

b. In this reaction, ethanol is oxidized and NAD⁺ is reduced

c. In this reaction, both ethanol and NAD⁺ are reduced

d. In this reaction, both ethanol and NAD⁺ are oxidized

Which of the molecules below are branched?

a. II, III, and IV

b. II and IV

c. I only

d. I and III

Glucose, the most common sugar, contain which of the following carbonyl-containing functional groups?

a. ketone

b. carboxylic acid

c. amide

d. aldehyde

Which of the following molecules contain(s) an alcohol?

a. II only

b. Both I and II contain an alcohol

c. III only

d. I only

Which of the following organic molecules contain at least one functional group?

a. Only molecules III and IV contain a functional group

b. Molecules II, III, and IV contain at least one functional group

c. None of these molecules contain a functional group

The following reaction is an example of a(n) ______________ reaction.

CH₄ + 2O₂ → CO₂ + 2H₂O

I. Oxidation–reduction

II. Acid-base

III. Hydrogenation

a. I and II only

b. I only

c. III only

d. I and III only

Which of the following functional group does not contain a carbonyl carbon?

a. ketone

b. aldehyde

c. ether

d. amide

Amines are ______________ because they react with water to ______________ a proton.

a. bases; donate

b. acids; donate

c. bases; accept

d. acids; accept

What is the product of the following reaction?

...

What type of biomolecule is shown below?

a. a saturated fatty acid

b. a nucleic acid

c. a polyunsaturated fatty acid

d. a sugar

FAD and NAD⁺ are example of

a. enzymes

b. inhibitors

c. coenzymes

d. sustrates

Examples of thiols in nature include

a. garlics

b. onions

c. skunk spray

d. all of these are examples of thiols

What do the following molecule have in common?

a. an alcohol

b. a carbonyl-containing functional group

c. an ionic bond

d. a carbon with a linear molecular geometry

Enzymes are categorized by

a. the cell and tissue type in which they are located

b. none of the above are correct

c. the type of reaction that they catalyze

d. their size and number of amino acids that compromise them

Sorbitol is a sweetener often used in chewing gum and diet drinks. It is obtained by the following reaction. Is glucose oxidized or reduced during the reaction?

a. many different reactions occur

b. it is reduced

c. it is both oxidized and reduced

d. it is oxidized

Glucose is an example of a(n)

a. diol

b. triol

c. polyol

d. phenol

Hydrocarbons are ______________ and interact only through ______________ forces.

a. polar; dispersion

b. polar; dipole-dipole

c. non polar; dispersion

d. non polar; dipole-dipole

e. polar; hydrogen bonding

What type of reaction is this?

a. dehydration

b. hydration

c. oxidation

d. reduction

Which molecule is chiral?

a. molecule b

b. molecule e

c. molecule a

d. molecule d

e. molecule c

The term substrate refers to the _______________ in a biochemical reaction.

a. product

b. catalyst

c. enzyme

d. reactant

Which of these fats is liquid at room temperature?

a. B only

b. A only

c. A and B

Which molecule contains an amide?

...

Which terms from this list BESY describe the following compound?

I. Alkane

II. Alkene

III. Alkyne

IV. Aromatic

V. Saturated hydrocarbon

VI. Unsaturated hydrocarbon

a. III and V

b. II and VI

c. I and V

d. III and VI

e. II and V

What structural characteristic is shared by the aldehydes and the ketones?

a. Aldehydes and ketones have no shared characteristics

b. They both are straight chain compounds

c. Aldehydes and ketones both contain a carbonyl carbon

d. Both of these classes are only seen as 5 carbon skeleton compounds

Which statement BEST describes the relationship between the following two structures?

a. They have different molecular formulas

b. One is saturated, and the other is unsaturated

c. They are identical molecules in the same conformation

d. They are isomers

Which BEST describes the functional group(s) in this molecule?

a. an alcohol and an amine

b. a carboxylic acid

c. an alcohol, a sodium, and a carbonyl

d. an alcohol and a ketone

What is the molecular formula of hexane?

a. C₄H₁₀

b. C₃H₈

c. C₆H₁₄

d. C₅H₁₂

e. C₂H₆

Vanillin is the molecule tat gives vanilla extract its characteristic oder and flavor. Which functional group in vanillin is an aldehyde?

a. III

b. I

c. IV

d. II

Which statement BEST describes a similarity between a hydration and dehydration reaction?

a. They both involve hydrogen

b. They both result in forming one molecule from two

c. They both result in splitting a molecule

d. They both involve water

An ester, thirster, or amide can all undergo hydrolysis. Which characteristic do these three reactions have in common?

a. All require a strong acid to occur

b. All are very fast reactions

c. All are very unfavorable

d. All produce a carboxylic acid

Below are several different molecules. Which one contains a ketone?

a. Only I and II are ketones

b. All of these molecules contain a ketone

c. Only I and IV are ketones

d. Only I is a ketone

Which element is NOT a heteroatom?

a. oxygen

b. nitrogen

c. carbon

d. sulfur

Heptane is an unbranded hydrocarbon; which structure is heptane?

Below is a ball-and-stick model of acetone. Which of the following Lewis structures is acetone?

a. structure d

b. structure e

c. structure c

d. structure a

e. structure b

Which of the following molecules contains a primary alcohol?

a. adrenalin and serine

b. chitin and glucose

c. chitin, glucose, and serine

d. glucose and adrenalin

Which structure is a monosaccharide?

a. structure b

b. structure c

c. structure d

d. structure a

Which of the following compounds contain a heteroatom?

a. Only II contains a heteroatom

b. III and IV contain a heteroatom

c. I and II contain a heteroatom

d. I, II, and III contain a heteroatom

D-Fructose is a simple sugar. What is the functional group indicated by the arrow?

a. ketone

b. aldehyde

c. alcohol

d. carboxylic acid

Soap has a polar head and non polar tail. Thus, soap is ________________.

a. ambiguous

b. amphoteric

c. ambivalent

d. amphibious

e. ambidextrous

Enzyme activity is measured by

a. How easily it denatures in acid

b. Determining the amount of protein present

c. How many substrates it can combine

d. Determining the amount of product formed within a certain amount of time

The Fischer projection for fructose is shown below. Fructose is a ________________.

a. pentose

b. hexose

c. tetrose

d. triose

Tetracycline is a common antibiotic. Select the choice in which the two boxed functional groups are correctly identified.

a. I: amine; II: amine

b. I: amide; II: amine

c. I: amine; II: amide

d. I: amide; II: amide

Which of the following molecules contain(s) an ether functional group?

a. I only

b. Both I and II

c. II only

d. III only

A molecule that is non superimposable on it mirror image is/are _________________.

a. reflective

b. identical

c. conformers

d. chiral

Which of the following compounds is a saturated hydrocarbon?

a. III and IV

b. I only

c. IV only

d. I and II

What is the structure of the conjugate acid formed when methylamine accepts a hydrogen ion (H⁺) from water?

a. structure b

b. structure c

c. structure a

d. structure e

e. structure d

In an oxidation-reduction reaction, the species that gains electrons is

a. reduced

b. oxygen

c. oxidized

d. hydrogen