AP Biology Molecules of Life

Question 1

Which parts of amino acids are involved in peptide bonds?

Accepted Answer

amino group on amino acid and carboxyl group on the other

Question 2

Which is a hydroxyl group?

Accepted Answer

-OH

Question 3

Which is a Sulfhydryl?

Accepted Answer

-SH

Question 4

What happens during a hydrolysis reaction?

Accepted Answer

the bond between two subunits of a macromolecule is broken

Question 5

Cis-trans iomers ___?

Accepted Answer

have flipped elements

Question 6

What Functional group(s) are in all amino acids?

Accepted Answer

Carboxyl and Amino

Question 7

Triacylglycerol contains fatty acids and

Accepted Answer

glycerol

Question 8

Which is an organic molecule?

Accepted Answer

CH4

Question 9

In nucleic acids, the purine nitrogenous bases are

Accepted Answer

adenine and guanine

Question 10

There are several levels of protein structure, the most complex of which is

Accepted Answer

Quaternary

Question 11

Which element is always associated with organic chemistry?

Accepted Answer

Carbon

Question 12

In proteins, elements of secondary structure combine to form a(n)

Accepted Answer

motif

Question 13

Which functional group is nonpolar?

Accepted Answer

Methyl

Question 14

Nucleic acids are chains of 5-carbon sugars linked by ____ bonds.

Accepted Answer

phosphodiester

Question 15

The globular shape of the protein is called the _____ structure.

Accepted Answer

Tertiary

Question 16

Nucleotides have a nitrogenous base attached to a sugar at the:

Accepted Answer

1' carbon

Question 17

What type of macromolecule carries out catalysis in biological systems?

Accepted Answer

)proteins called enzymes

Question 18

What changes causes two enatiomers to change their effects?

Accepted Answer

Shape

Question 19

What are the six most important chemical elements of life?

Accepted Answer

carbon, nitrogen, oxygen, hydrogen, phosphate, sulfur

Question 20

What is the difference between Ketone and Aldehyde groups?

Accepted Answer

placement

Question 21

In a folded protein, the nonpolar (hydrophobic) amino acids tend to be:

Accepted Answer

tucked away inside the protein

Question 22

At what level(s) of protein structure would you expect to find disulfide bridges?

Accepted Answer

only in secondary and tertiary

Question 23

Which is an amino group?

Accepted Answer

-NH2

Question 24

Why is Carbon the most common element in organic chemistry?

Accepted Answer

It is able to bond with many elements, It can form four bonds

Question 25

Which is a Carbonyl group?

Accepted Answer

-CO

Question 26

The group of molecules called nucleotides contain:

Accepted Answer

all

Question 27

Molecular chaperones ________

Accepted Answer

Help fold and refold protein

Question 28

Which is a carboxyl group?

Accepted Answer

-COOH

Question 29

All of the following are true of protein denaturation except that it

Accepted Answer

is always irreversible

Question 30

What are the properties of hydrocarbons?

Accepted Answer

Hydrophobic, nonpolar, good source of stored energy

Question 31

Which of these is not a lipid?

Accepted Answer

Chitin

Question 32

In a DNA molecule, what bonds hold together nitrogenous bases from the two polymer chains?

Accepted Answer

hydrogen

Question 33

Which part of an amino acid gives it its unique properties?

Accepted Answer

Side Chain

Question 34

What is entropy?

Accepted Answer

disorder

Question 35

Which of the following nitrogenous bases is found in DNA but is not found in RNA?

Accepted Answer

thymine

Question 36

Which is a phosphate group?

Accepted Answer

-PO4

Question 37

The empirical formula for carbohydrates is

Accepted Answer

(CH20)n

Question 38

What provides the information necessary to specify the three-dimensional shape of a protein?

Accepted Answer

The protein's amino acid sequence

Question 39

What shape does a carbon atom form when covalently bonded with four other elements?

Accepted Answer

Tetrahedron

Question 40

Which is a methyl group?

Accepted Answer

-CH3

Question 41

In the formation of a macromolecule, what type of bond would join two amino acid subunits?

Accepted Answer

peptide bond

Question 42

With respect to galactose, glucose is

Accepted Answer

structural isomer

Question 43

The sequence of amino acids in a polypeptide is called the ___ structure.

Accepted Answer

primary

Question 44

What is the difference between DNA and RNA sugar?

Accepted Answer

DNA has more oxygen

AP Biology Molecules of Life

Questions 44

AP Biology Molecules of Life

Questions 44