Quiz 1

Question 1

The tertiary structure of a protein is the

Answer 1

Unique three-dimensional shape of the fully folded polypeptide

Question 2

What is the structural feature that allows DNA to replicate

Answer 2

Complementary pairing of the nitrogenous bases

Question 3

About 25 of the 92 natural elements are known to be essential to life. Which four of these elements make up 96% of living matter?

Answer 3

Carbon, hydrogen, nitrogen, oxygen.

Question 4

Which type of bond must be broken for Waters vaporize?

Answer 4

Hydrogen bonds

Question 5

Saturated fatty acids

Answer 5

Have the maximum number of hydrogen atoms possible and NO double bonds

Question 6

Which bond or interaction would be difficult to disrupt and compounds are put into water?

Answer 6

Covalent bonds

Question 7

If a DNA sample composed of 10% thymine what would be the percentage of guanine?

Answer 7

40

Question 8

Which two functional groups are always found in amino acids?

Answer 8

Carboxyl and amino

Question 9

Buffer solutions

Answer 9

They maintain a relatively constant pH when either acids or bases are added to them

Question 10

Covalent bond

Answer 10

Outer shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms

Question 11

Which of the following affects is produced by the high surface tension of water?

Answer 11

A water strider can walk across the surface of the small pond

Question 12

How many electron pairs does carbon share in order to complete its valence shell

Answer 12

4

Question 13

The method of Scientific inquiry that describes natural structures and processes as accurately as possible through careful observation and analysis of data is known as

Answer 13

Discovery science

Question 14

What results from an unequal sharing of electrons between atoms

Answer 14

A polar covalent bond

Question 15

What is the term used for a protein molecule that assists in the proper folding of other proteins

Answer 15

Chaperonin

Question 16

The partial negative charge in a molecule of water occurs because

Answer 16

The electrons shared between the oxygen atoms spend more time around the oxygen atoms nucleus than around the hydrogen atom
nucleus

Question 17

At which level of protein structure are interactions between the side chains most important

Answer 17

Tertiary

Question 18

Which of the following descriptions best fits the class of molecules known as nucleotides

Answer 18

A nitrogenous base, a phosphate group, and a pentose sugar.

Question 19

Dehydration reactions verse Hydrolysis

Answer 19

Dehydration reactions assemble polymers and hydrolysis reactions breakdown polymers

Question 20

How will brief heating effect macromolecular structures in aqueous solutions

Answer 20

DNA duplexes unwind and separate and proteins unfold

Question 21

Lipids

Answer 21

They are insoluble in water

Question 22

A carbon atom is most likely to form what kind of bond with other atoms

Answer 22

A covalent bond

Question 23

What maintains the secondary structure of a protein

Answer 23

Hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond

Question 24

Which of the following explains most specifically the attraction of water molecules to one another

Answer 24

Hydrogen bond

Question 25

Why does ice float in the liquid water

Answer 25

Hydrogen bonds stabilize and keep the molecules of ice farther apart than water molecules of liquid water

Question 26

Which of the following is a hydrophobic material

Answer 26

Wax

Question 27

The element present in all organic molecules is

Answer 27

Carbon

Question 28

A molecule with chemical formula C6H1206 is probably a

Answer 28

Carbohydrate and monosaccharide only

Question 29

Which of the following is the best description of the control for an experiment

Answer 29

The control group is matched with the experimental group except for one of the experimental variable

Question 30

Humans can digest starch but not cellulose because

Answer 30

Humans have enzymes that hydrolyze the alpha glycosdic linkages of starch but not the beta glycosdic linkages of cellulose

Question 31

Why are hydrocarbons insoluble in water

Answer 31

The majority of their bonds are nonpolar covalent carbon to hydrogen linkages

Question 32

If there are 20 different amino acids. What makes one amino acid different from another?

Answer 32

Different side chains (R Groups) attached to an alpha carbon

Question 33

Hydrophobic substances such as vegetable oil are

Answer 33

Nonpolar substances that repel water molecules

Question 34

Which bonds are created during the formation of the primary structure of a protein

Answer 34

Peptide bonds

Question 35

Deductive reasoning is

Answer 35

General observations that lead to specific results

Question 36

Polar covalent bonds are

Answer 36

Unequal sharing of electrons

Question 37

Which bonds are strong and difficult to break

Answer 37

Covalent bonds

Question 38

The attraction between two of the silver charged ions is

Answer 38

Ionic bond

Question 39

Celery is rich in a type of glucose molecule that cannot be digested by humans. Which is the polysaccharide that is found in celery

Answer 39

Cellulose

Question 40

Which is the polysaccharide that has the most branches

Answer 40

Glycogen

Question 41

Adhesion

Answer 41

Molecules of one type stick to molecules of another type

Question 42

Cohesion

Answer 42

Molecules of the same type stick to each other

Question 43

Specific heat

Answer 43

Amount of heat required to raise the temperature of 1 g of substance by 1°C

Question 44

Heat of vaporization

Answer 44

Amount of heat required to convert 1 g from liquid to vapor