Chapter 3- The Molecules of Cells

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Characteristics of carbon that contribute to its ability to form an immense diversity of organic molecules include its

all of the above

Hydrocarbons

contain only carbon and hydrogen atoms

Propanol and isopropanol are isomers. This means that they have

the same molecular formula but different chemical structures (properties)

Organic compounds

always contain carbon

Which of the following is an amino group?

-NH2

Which of the following statements is (are) true of the polymers found in living organisms?

all types of organisms use approximately the same set of monomer to form their polymers

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

all of the above are true

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

proteins, nucleic acids, polysaccharides

A molecule with the formula C55H110O55 is probably a

polysaccharide

Sucrose, fructose and maltose

are carbohydrates

Glycogen

all of the above

How does glucose differ from sucrose, cellulose and starch?

it is a monosaccharide

Which of the following is not a polysaccharide?

sucrose

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

plants

Humans cannot derive nutrients from the cellulose in plant food because

they lack the enzymes needed to break down the cellulose

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

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

Lipids are important in animal cells as

a and b

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

both a and d

Hydrophobic compounds are

repelled by water

A triglyceride

all of the above

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

unsaturated

Enzymes

all of the above

Proteins differ from one another because

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

Glucose molecules are tostarch as______ are to proteins

amino acids

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

primary

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

both b and d

Nucleotides

all of the above

Genetic information is encoded in the

sequence of the nucleotides in DNA

Which of the following substances contains nitrogen?

all of the above

How does DNA differ from RNA?

all of the above are differences

Which, if any, of the following choices does not properly pair an organic compound with one of its building blocks (subunits)?

nucleic acid-- glycerol

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

carboxyl

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