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35 notecards = 9 pages (4 cards per page)

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Gen Bio CH 3

front 1

Which one of the following is an amino group?

back 1

NH2

front 2

Which one of the following contains a carboxyl and an amino group?

back 2

AMINO ACIDS

front 3

DNA differs from RNA because DNA

back 3

contains thymine in place of uracil.

front 4

Which one of the following statements about the monomers and polymers found in living organisms is FALSE?

back 4

During digestion monomers are joined together to make polymers which are then absorbed by the body.

front 5

Which of the following statements is/are true about dehydration synthesis?

back 5

A)All of the choices are correct.
B) Covalent bonds are formed between the monomers.
C) One monomer loses a hydrogen atom, and the other loses a hydroxyl group.
D) Electrons are shared between atoms of
the joined monomers.
E) H2O is formed as the monomers are joined.
ANSWER = A

front 6

The tertiary structure of a polypeptide refers to

back 6

the overall three-dimensional structure

front 7

The results of dehydration synthesis can be reversed by

back 7

hydrolysis

front 8

Proteins differ from one another because

back 8

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

front 9

Which list below consists of only polymers?

back 9

proteins, lipids, nucleic acids, polysaccharides

front 10

Hydrocarbons

back 10

contain only carbon and hydrogen atoms.

front 11

Which one of the following will not be affected by the denaturation of a protein?

back 11

the number of amino acids in the protein

front 12

Organic compounds :

back 12

always contain carbon.

front 13

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

back 13

chemically saturating the oil by adding hydrogens, decreasing the number of double bonds in the molecules.

front 14

Genetic information is encoded in the

back 14

sequence of nucleotides in DNA.

front 15

Carbon is able to form an immense diversity of organic molecules because of carbon's

back 15

A) ability to bond together to form extensive, branched, or unbranched "carbon skeletons."
B) capacity to form single and double bonds.
C) ability to bond with up to four other atoms.
D) tendency to form covalent bonds.
E) All of the choices are correct.

front 16

You now know that the old cliche "oil and water don't mix" is true. Why?

back 16

Water exhibits polarity and oil does not.

front 17

Amino acids can be distinguished from one another by

back 17

the chemical properties of their R groups.

front 18

In salad dressings, oil quickly separates from vinegar because oils are

back 18

nonpolar

front 19

Which one of the following is not the proper pairing of a polymer and its monomer?

back 19

triglyceride and steroid

front 20

Which one of the following is not a type of protein?

back 20

A) All of these are types of proteins.
B) signal proteins
C) enzymes
D) antibodies
E) contractile proteins

front 21

Sulfur has atomic number 16. How many single covalent bonds would you expect a sulfur atom to form?

back 21

2

front 22

Which of the following factors can result in the denaturation of a protein?

back 22

A) chemicals that destroy hydrogen bonds
B) heat
C) changes in salt concentration
D) changes in pH
E) All of the choices can result in the denaturation of a protein.

front 23

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

back 23

PRIMARY

front 24

A phospholipid is composed of

back 24

one glycerol molecule linked to one phosphate group and two fatty acids

front 25

Cellulose differs from starch in that

back 25

most animals cannot break down cellulose, whereas starch is easily digested.

front 26

Which one of the following statements about animal cell lipids is false?

back 26

Many lipids function as enzymes

front 27

the building block for proteins

back 27

Amino acid

front 28

hydrophobic organic molecules containing just carbon and hydrogen

back 28

hydrocarbon

front 29

A type of lipid with 4 distinctive carbon rings. Many hormones related to reproduction are this type of lipid

back 29

sterol

front 30

fats and oils..this type of lipid contains glycerol and 3 fatty acids

back 30

triglyceride

front 31

this molecule contains a phosphate, five carbon sugar and a nitrogenous base and is the building block for DNA and RNA

back 31

nucleotide

front 32

a monomer for making cellulose and starch and glycogen

back 32

glucose

front 33

A protein containing more than one polypeptide chain exhibits the __________ level of protein structure.

back 33

quaternary

front 34

A hydroxyl group is

back 34

characteristic of alcohols

front 35

Which one of the following statements about the functional groups of organic compounds is false?

back 35

All functional groups include a carbon atom of the organic compound's skeleton.