Bio 181 Final

Front 1

Ketoses are sugars with the functional group:

Back 1

carbonyl ketone

Front 2

The tetravalence of carbon most directly results from:

Back 2

its four electrons in the valence shell that can form four covalent bonds

Front 3

The functional group that confers acidic properties to organic molecules is:

Back 3

-COOH

Front 4

Disaccharides can differ from each other in all of the following ways except:

Back 4

in the number of their monosaccharides

Front 5

Plants store most of their energy as

Back 5

starch

Front 6

What happens when a protein denatures?

Back 6

It loses its secondary and tertiary structure

Front 7

The alpha-helix of a proteins is not:

Back 7

a double helix

Front 8

Unsaturated fatty acids have double bonds in their hydrocarbon backbones

Back 8

true

Front 9

Monomers make polymers by ___ reactions.

Back 9

dehydration or condensation

Front 10

If molecules of glycogen are breaking into smaller sugar units, the system is most likely carrying out hydrolysis reactions

Back 10

true

Front 11

What is true about structural isomers?

Back 11

They have different chemical properties

They have the same molecular formula

Their atoms and bonds are arranged in different sequences

Front 12

Hydrocarbons are hardly soluble in water because

Back 12

the C - H bond is nonpolar

Front 13

A protein with 124 alpha-helices folds into

Back 13

a secondary structure

Front 14

A reducing agent

Back 14

transfers electrons to a molecule, to a salt, or to an atom

Front 15

Are amphipatic molecules soluble in water?

Back 15

Yaaassss

Front 16

Aldoses are sugars with the functional group:

Back 16

carbonyl aldehyde

Front 17

Amino acids, the building blocks of proteins, have the following functional groups:

Back 17

carboxyl and amino

Front 18

Lipids have the following functional group in their structure:

Back 18

carboxyl

Front 19

Saturated fatty acids have _____ covalent bonds in their hydrocarbon tails, while unsaturated fatty acids have _____ covalent bonds in their hydrocarbon tails

Back 19

single/double

Front 20

What is the structure of a triglyceride (triacylglycerol)?

Back 20

one molecule of glycerol and three molecules of fatty acids

Front 21

In an amino acid, the "R" (residue) group represents:

Back 21

the signature group that makes different every amino acid

Front 22

Polymers are broken down into monomers through:

Back 22

Hydrolysis reactions

Front 23

Amino acids are bonded by _______ to form a polypeptide chain.

Back 23

peptide bonds

Front 24

A protein primary structure consists of its sequence of amino acids

Back 24

True

Front 25

A protein that folds into a quaternary structure has more that one polypeptide chain.

Back 25

True

Front 26

In an enzymatic reaction, the substance that reacts with the enzyme is called:

Back 26

substrate

Front 27

The interaction enzyme-substrate is, in most enzymatic reactions, specific.

Back 27

True

Front 28

Enzymes are catalysts that lower _____ necessary for a reaction to occur.

Back 28

the activation energy

Front 29

A competitive inhibitor competes with the ______ for the enzyme's _____

Back 29

substrate/active site

Front 30

To which enzyme's site a non-competitive inhibitor would bind?

Back 30

allosteric site

Front 31

In feed-back inhibition, enzyme activity is blocked by:

Back 31

the end product(s)

Front 32

All enzymes are proteins

Back 32

false

Front 33

Ribozymes are nucleic acid enzymes

Back 33

True

Front 34

Factors such as temperature and pH do not affect enzyme function

Back 34

false

Front 35

A protease would be an enzyme acting on:

Back 35

a nucleic acid

Front 36

How are the nucleotide monomers connected to form a polynucleotide?

Back 36

covalent bonds between the sugar of one nucleotide and the phosphate of the next

Front 37

Monkeys and humans share many of the same DNA sequences and have similar proteins, indicating that

Back 37

the two groups share a relatively recent common ancestor

Front 38

Adenine and guanine are

Correct!

Back 38

purines

Front 39

Thymine and cytosine are

Back 39

pyrimidines

Front 40

Uracil is a nitrogenous base found in

Back 40

RNA

Front 41

A pentose joined to a nitrogenous base and a phosphate group is called a

Back 41

nucleotide

Front 42

Which of the following statements about DNA polymerase is incorrect?

Back 42

It forms hydrogen bonds between complementary base pairs

Front 43

How does DNA synthesis along the lagging strand differ from that of the leading strand?

Back 43

Okazaki fragments, which each grow 5' to 3', must be joined along the lagging strand

Front 44

Single-strand binding proteins hold strands of unwound DNA apart and straight

Back 44

Tru gurl

Front 45

Enzymes are catalysts that increase the activation energy necessary for a reaction to occur

Back 45

Nuh uh. It false

Front 46

A competitive inhibitor binds to the enzyme's ____ site.

Back 46

active

Front 47

To which enzyme's site a non-competitive inhibitor would bind?

Back 47

allosteric

Front 48

The action of a non-competitive inhibitor usually affects the shape of the enzyme's active site

Back 48

true

Front 49

Enzyme A is regulated by an allosteric, non-competitive inhibitor. If, after modifying the pH conditions of the environment where the enzymatic reaction takes place the enzyme allosteric site's shape changes, would you expect more or lesser amount of the enzyme product?

Back 49

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