Chapter 1 Vocab

Question 1

What type of environment do biochemical reactions require?

Answer 1

aqueous

Question 2

What is resistant to temperature change?

Answer 2

water

Question 3

Water acts as a what to organisms and ecosystems?

Answer 3

temperature buffer

Question 4

What kind of molecule is water?

Answer 4

polar molecule

Question 5

Is oxygen or hydrogen more electronegative in water?

Answer 5

oxygen (causes partial charges-polar)

Question 6

hydrogen bonds

Answer 6

attraction between a partially positive hydrogen and an atom with a partially negative charge

Question 7

How many hydrogen bonds can one water molecule form?

Answer 7

4

Question 8

What allows water to be liquid at room temperature?

Answer 8

hydrogen bonding

Question 9

What kind of molecules are soluble in water?

Answer 9

polar (hydrophilic)

Question 10

hydrophilic

Answer 10

waterloving

Question 11

what kind of molecules are insoluable in water?

Answer 11

nonpolar (hydrophobic)

Question 12

hydrophobic

Answer 12

water fearing

Question 13

acid definition

Answer 13

donates protons (H+)

Question 14

base

Answer 14

accepts protons (H+)

Question 15

pH

Answer 15

defined as the negative log of H+ concentration in solution

Question 16

neutral pH

Answer 16

7.0

Question 17

acidic pH

Answer 17

pH< 7.0

Question 18

basic pH

Answer 18

pH> 7.0

Question 19

1 unit change in pH causes a

Answer 19

10 fold change in H+ concentration