View the step-by-step solution to:

Question

Question 1 

 

style="color:rgb(73,76,78);">Hydrolysis of the disaccharide sucrose gives the following monosaccharides:

1) 

fructose and ribose.

2) 

fructose and glucose.

3) 

ribose and glucose.

4) 

ribose and galactose.

5) 

fructose and lactose.

Question 2 

 

Iodine can be used to detect the presence of __________ in solution.

1) 

maltose.

2) 

fructose.

3) 

starch.

4) 

galactose.

5) 

xylose.

Question 3 

 

In the R- isomer of glucose, the -OH group furthest from the carbonyl is written ___________ of a Fischer projection.

1) 

on the left of the top chiral carbon.

2) 

on the right of the top chiral carbon.

3) 

on the left of the middle chiral carbon.

4) 

on the left of the bottom chiral carbon.

5) 

on the right of the bottom chiral carbon.

Question 4 

 

The monosaccharide that is contained in both cellulose and starch is:

1) 

glucose.

2) 

galactose.

3) 

fructose.

4) 

lactose.

5) 

sucrose.

Question 5

 

Glucose does not undergo hydrolysis because it is a

1) 

aldose.

2) 

hexose.

3) 

reducing sugar.

4) 

monosaccharide.

5) 

disaccharide.

Question 6 

 

What type of reaction would result in soap?

1) 

hydrogenation

2) 

reduction

3) 

hydration

4) 

oxidation

5) 

saponification

Question 7

 

Unsaturated fatty acids have lower melting points than saturated fatty acids because

1) 

they have fewer hydrogen atoms.

2) 

they have more hydrogen atoms.

3) 

their molecules fit closely together.

4) 

the cis double bonds produce a shape that reduces contact between molecules.

Question 8

 

Polyunsaturated fatty acids contains more than one

1) 

carboxyl group.

2) 

hydroxyl group.

3) 

carbonyl group.

4) 

long carbon chain.

5) 

double bond.

Question 9

 

Lipids are compounds that are soluble in

1) 

distilled water.

2) 

normal saline solution.

3) 

glucose solution.

4) 

nonpolar solvents.

5) 

oxygen.

Question 10 

 

A lipoprotein's main function in the body is to

1) 

dissolve polar lipids for excretion.

2) 

metabolize lipids into new substances.

3) 

dissolve polar lipids in urine.

4) 

transport nonpolar lipid to body cells.

5) 

store lipids in the tissues.

Question 11 

 

Sucrase, the protein that catalyzes the hydrolysis of sucrose, would be classified as a ________ protein.

1) 

transport

2) 

hormonal

3) 

enzyme

4) 

structural

5) 

contractile

Question 12

 

What kinds of interactions are not part of tertiary protein structure?

1) 

α-helix

2) 

disulfide bonds

3) 

hydrophilic interactions

4) 

salt bridges

5) 

hydrophobic interactions

Question 13

 

An enzyme-catalyzed reaction ___________ than reactions that are not catalyzed.

1) 

uses less substrate.

2) 

produces different products.

3) 

occurs at a faster rate.

4) 

requires more energy.

5) 

requires a higher temperature.

Question 14

 

If an amino acid is in its zwitterion form, the amine end is

1) 

positively charged.

2) 

negatively charged.

3) 

neutral.

4) 

soluble in a nonpolar solvent.

5) 

attached to an amine.

Question 15

 

The bonds that link amino acids in a protein are

1) 

ester bonds.

2) 

ether bonds.

3) 

peptide bonds.

4) 

glycosidic bonds.

5) 

sulfide bonds.

Question 16

 

The reactant is an enzyme catalyzed reaction is called the:

1) 

substrate.

2) 

cofactor.

3) 

coenzyme.

4) 

isozyme.

5) 

allostere.

Question 17 

 

Which of the following is a primary protein structure?

1) 

β-sheet

2) 

Ser-Met-Ala-Gly-Ile-Gly

3) 

disulfide bond

4) 

α-helix

5) 

hydrophobic interactions

Question 18

 

The following are all characteristic of a competitive inhibitor except:

1) 

It occupies the active site.

2) 

It cannot be converted to products.

3) 

It has a structure similar to the substrate.

4) 

Increasing the substrate concentration can reverse competitive inhibition.

5) 

It binds to the enzyme at a site remote from the active site.

Question 19 

 

The function of the enzyme-substrate complex is to

1) 

lowers the energy of the products.

2) 

lowers the energy of the substrate.

3) 

changes the concentration of the substrate.

4) 

decreases the activation energy for the reaction.

5) 

changes the possible product formed.

Question 20

 

What is the process that  occurs when heat, acids, bases, or heavy metal ions cause a loss of biological activity of a protein?

1) 

denaturation

2) 

saponification

3) 

hydrogenation

4) 

amidation

5) 

esterification

Question 21

 

What type of carbohydrate is pictured below?

8.png


an R-isomer of a monosaccharide

an L-isomer of a monosaccharide

a beta isomer of a monosaccharide

an alpha isomer of a monosaccharide

Question 22

 

What type of lipid is shown below?

7.png


steroid

wax

fatty acid

tryacylgliceride

Question 23 

 

What type of lipid is shown below?

6.png


steroid

wax

fatty acid

tryacylgliceride

Question 24

 

What type of lipid is shown below?


00.png

steroid

wax

fatty acid

tryacylgliceride

Question 25

 

Which of the following lipids would have the lowest melting point?

a)3.png

b)4.png

c)

Question 26

 

Which form of ion is the following amino acid shown?

2.jpg

zwitterion

anion

cation

isoanion

Question 27

 

What type of amino acid is shown below?

1.jpg

acidic amino acid

polar amino acid

nonpolar amino acid

basic amino acid

Question 28

 

What type of amino acid is shown below?


acidic amino acid

polar amino acid

nonpolar amino acid

basic amino acid

Question 29 

 

Which of the following are produced by the hydrolysis of maltose?

One molecule each of D-galactose and L-glucose

Two molecules of L-fructose

One molecule each of D-glucose and D-fructose

Two molecules of D-glucose

One molecule each of L-galactose and D-fructose

Question 30

 

Which of the following disorders results from the absence of an enzyme needed to convert galactose to glucose?

Lactose intolerance

Glucose-galactose malabsorption

Galactosemia

Hypoglycemia

Phenylketonuria

Question 31 

 

Maltose is sweeter than sucrose.

True

False

Question 32 

 

Which of the following reagents is used to detect the presence of starch in a solution?

Tollen's reagent

Iodine

Potassium dichromate

Benedict's solution

Copper(II) acetate

Question 33

 

Which of the following monosaccharides is a ketohexose?

Fructose

Glucose

Xylose

Galactose

Ribose

Question 34

 

Starch is more easily digested than dextrins and is therefore used extensively in the commercial preparation of infant foods.

True

False

Question 35

 

Which of the following types of glycosidic linkages is responsible for the branching in the structure of amylopectin?

Question 35 options:

α-1,4 glycosidic linkages

β-1,6 glycosidic linkages

α-1,3 glycosidic linkages

α-1,6 glycosidic linkages

α-1, β-2 glycosidic linkages

Question 36

 

The hydrolysis of fats and oils in the presence of a base is used to make soap and is called _____.

saponification

transesterification

desiccation

olefination

glycosidation

Question 37 

 

Pure fats and oils are colorless, odorless, and tasteless.

True

False

Question 38 

 

Cerebrosides resemble sphingomyelins but have a sugar unit in place of the choline phosphate group.

True

False

Question 39 

 

The major function of bile salts is to aid in the digestion of dietary lipids.

True

False

Question 40 

 

A triglyceride is called a fat if:

Question 40 options:

it has no carbon-to-carbon double bonds in its structure.

it is a liquid at room temperature.

it has three different fatty acid units attached to glycerol.

it has three saturated fatty acid units attached to glycerol.

it exists as a solid at 25° C.

Question 41

 

Peripheral proteins are a type of membrane proteins that span the hydrophobic interior of the bilayer.

True

False

Question 42 

 

_____ are lipids with four fused ring structures.

Sphingolipids

Phospholipids

Steroids

Enzymes

Gangliosides

Question 43 

 

_____ are double strata of lipids arranged so that the hydrophobic tails are sandwiched between an inner surface and an outer surface consisting of hydrophilic heads.

Bilayers

Micelles

Emulsions

Transferomes

Suspensions

Question 44 

 

Which of the following refers to the fixed arrangement of the polypeptide backbone?

Quinary structure

Quaternary structure

Tertiary structure

Secondary structure

Primary structure

Question 45 

 

The structure of an amino acid allows it to act as both an acid and a base, but not simultaneously.

Question 45

True

False

Question 46 

 

Which of the following proteins performs the biological function of providing strength and structure?

Hemoglobin

Ovalbumin

Keratin

Myosin

α-Amylase

Question 47

 

Humans can synthesize only about half of the needed amino acids and the remainder must be obtained from the diet.

True

False

Question 48 

 

A(n) _____ is a molecule that contains an amino group and a carboxyl group.

Question 48 options:

amide

nitrile

amine

amino acid

imine

Question 49 

 

What denaturation effect do alkaloid reagents have on proteins?


They cause protein atoms to vibrate more rapidly and crystallize the protein.

They combine with positively charged amino groups in proteins and disrupt ionic bonds.

They engage in intermolecular hydrogen bonding with protein molecules, strengthening intramolecular hydrogen bonding within the protein.

They supply kinetic energy to protein molecules and disrupt relatively strong hydrogen bonding and dispersion forces.

They form strong bonds with the carboxylate anions of the acidic amino acids or SH groups of cysteine, disrupting ionic bonds and disulfide linkages.

Question 50

 

Which of the following amino acids has the highest isoelectric point?

Lysine

Threonine

Histidine

Arginine

Alanine

00.png

1.jpg

2.jpg

3.png

4.png

6.png

7.png

8.png

Top Answer

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online