Biology Chapter 3

1.

1 point

Which of the following substances contains nitrogen

nucleotides

hair

all of the above

amino acids

2.

1 point

Humans cannot derive nutrients from the cellulose in plant food because

humans are unable to chew their food

the hyuman intestinal tract does not contain termites, which can break down cellulose

all of the above

humans lack the enzymes needed to break down the cellulose

3.

1 point

Which of the following is an example of secondary structure of a protein

an alpha helix and pleated sheet

a pleated sheet

an alpha helix

a particular amino acid sequence

4.

1 point

Foods that are high in fiber are most likely to be derived from

plants

dairy products

meat

fish

5.

1 point

The four main categories of macromolecules in a cell are

proteins, DNA, RNA, and steroids

proteins, nucleic acids, carbohydrates, and lipids

RNA, DNA, proteins, and carbohydrates

monosaccharides, lipids, polysaccharides, and proteins

6.

1 point

A molecule with the formula C55 H110 O55 is probably a(n)

oil

protein

steroid

polysaccharide

7.

1 point

A diet high in animal products may increase the risk for heart disease. This is apparently due to the fact that

most animal fats are unsaturated

most animal fats are saturated

most animal fats are oils

8.

1 point

Lipids are important in animal cells as

energy-containing compounds and components of cell membranes

components of cell membranes

energy-containing compounds

enzymes

9.

1 point

How does DNA differ from RNA

DNA consists of two strands in a double helix

all of the above are differences

One of their nitrogenous bases is different

they contain different sugars

10.

1 point

Sucrose, fructose, and maltose

are disaccharides

are isomers

are carbohydrates

link together by ionic bonds to form starch

11.

1 point

Glucose molecules are to starch as ______ are to proteins

amino acids

oils

waxes

fatty acids

12.

1 point

How does glucose differ from sucrose, cellulose, and starch?

it is a carbohydrate

it contains carbon, hydrogen, and oxygen

it is larger

it is a monosaccharide

13.

1 point

The results of dehydration synthesis can be reversed by

none of the above

a condensation reaction

a hydrolysis reaction

polymerization

14.

1 point

The _______ structure of a protein consists of a chain of amino acids assembled in a specific order.

primary

secondary

tertiary

quaternary

15.

1 point

Organic compounds

can only be synthesized in a laboratory

always contain nitrogen

always contain carbon

none of the above

16.

1 point

Fatty acids with double bonds between some of their carbons are said to be

hydrogenated

triglycerides

unsaturated

saturated

17.

1 point

Hydrocarbons

are inorganic compounds

are composed of carbon atoms that are attached to hydrogen skeletons

contain only carbon and hydrogen atoms

all of the above

18.

1 point

Proteins differ from one another because

the sequence of amino acids in the polypeptide chain differs from protein to protein

the number of nucleotides found in each protein varies from protein to protein

the number of nitrogen atoms in each amino acid varies

each protein contains its own unique sequence of sugar molecules

19.

1 point

Nucleotides

all of the above

contain phosphate groups

contain sugar molecules

contain nitrogenous bases

can be linked together to form a double helix

20.

1 point

Enzymes

all of the above

have structures that correspond to their function

function as organic catalysts

are proteins

regulate chemical reactions

21.

1 point

One way to convert an oil into a substance that is solid at room temperature is to

remove hydrogens, increasing the number of double bonds

add hydrogens, decreasing the number of double bonds in the molecules

add water and shake vigorously

Remove water, causing a dehydration synthesis reaction to occur

22.

1 point

Citric acid makes lemons taste sour. Which of the following is a function group that would cause a molecule like citric acid to be acidic?

hydrocarbon

hydroxyl

carboxyl

amino

23.

1 point

Genetic information is encoded in the

length of glycogen

quaternary structure of the the protein

degree of saturation of fatty acids

sequence of the nucleotide in DNA

24.

1 point

Which list below consists only of molecules that are all polymers?

sugars, amino acids, lipids

proteins, lipids, nucleic acids, sugars.

proteins, nucleic acids, polysaccharides

polysaccharides, lipids, amino acids, nucleic acids

25.

1 point

The characteristic of carbon that contributes to its ability to form an immense diversity of organic molecules include its

ability to bond with up to four other atom

capacity to form single and double covalent bonds

ability to bond together to form extensive, branched, unbranched carbon skeletons or rings

all of the above

26.

1 point

Monosaccharides can be joined together by a process called dehydration synthesis. Which of the following statements is (are) true of this process.

One monomer loses a hydrogen atom, and the other loses a hydroxyl group

H20 is formed as the monomers are joined

covalent bonds are formed between the monomers

all of the above are true.

27.

1 point

Hydrophobic compounds are

repelled by water

attracted to vinegar

attracted by water

attracted to hydrophilic

28.

1 point

A triglyceride

consists of three fatty acids attached to a glycerol

is a type of fat

is hydrophobic

all of the above

29.

1 point

Glycogen

all of he above

is a polysaccharide

is a storage molecule for sugar in animals

contains glucose molecules

contains C, H, and O atoms

30.

1 point

Propanol and isopropanol are isomers. This means that they have

different molecular formulas but the same chemical structures (properties)

the same molecular formula and the same chemical structures (properties)

he same number of carbon atoms but different numbers of oxygen and hydrogen atoms

the same molecular formula but different chemical structures (properties)