Unit 1 : The Chemistry Of Life : Chapter 4 & 5

Question 1

In a single molecule of water , 2 hydrogen atoms are bonded to a single oxygen atom by :

Answer 1

Polar Covalent Bonds

Question 2

Stanley Miller’s 1953 experiments concluded that :

Answer 2

Organic molecules cans be made abiotically under conditions that may have already existed on Earth

Question 3

What do Carbon, Nitrogen, Oxygen, and Hydrogen have in common :

Answer 3

All have unpaired electrons in their valence shells

Question 4

What functional group is incorrectly matched :

Answer 4

E. Carboxyl Group

Question 5

Water is able to form hydrogen bonds because :

Answer 5

The bonds that hold together the atoms in water are Polar Covalent bonds

Question 6

Is an acidic functional group that can release H+ into a solution :

Answer 6

E : COOH (Carboxly group)

Question 7

A basic functional group that can accept H + :

Answer 7

D. NH2

Question 8

Can exist as a Ketone or Aldehyde :

Answer 8

B. C=O

Question 9

A characteristic of Alcohol :

Answer 9

A. -OH

Question 10

Helps to stabilize proteins by forming covalent cross-links within or between protein molecules :

Answer 10

E. -SH

Question 11

How can Fatty acid Triglycerides be keep solid at warmer temperatures :

Answer 11

Adding hydrogens and trans double bonds to the fatty acids

Question 12

Unsaturated Fats are __________ at room temp and have _________ :

Answer 12

Liquids ; cis double bonds

Question 13

Molecule with 4 joined rings is the precursor of sex hormones and found in phospholipid bilayers :

Answer 13

Cholesterol

Question 14

A molecule with the formula C18H36O2 is _______ and C6H12O6 is _________ :

Answer 14

Fatty acids ; monosaccharides

Question 15

Answer 15

Polyunsaturated Fatty Acids

Question 16

Answer 16

Polyunsaturated Fatty Acid

Question 17

Answer 17

Saturated Fatty Acid

Question 18

Answer 18

Glucose

Question 19

Answer 19

Dipeptide

Question 20

Answer 20

Cholesterol

Question 21

What is true about this figure :

Answer 21

It results in a peptide bond

Question 22

A bond that joins monomers into polymers is a :

Answer 22

Covalent Bond

Question 23

Polysaccharides, Triacylglycerides, and Proteins have in common :

Answer 23

Are synthesized from subunits by dehydration reactions