biological molecules

Question 1

what does polar mean?

Answer 1

one end of a molecule has a slight positive charge and the other end has a slight negative charge

Question 2

Name 3 properties of water:

Answer 2

universal solvent, cohesion &adhesion, high heat capacity

Question 3

define cohesion

Answer 3

water molecules sticking together

Question 4

define adhesion

Answer 4

ability to stick to other polar substances

Question 5

what bond do water molecules form?

Answer 5

hydrogen bonds

Question 6

why is it good that water has a high heat capacity?

Answer 6

it maintains homeostasis, absorbs heat energy without changing state

Question 7

glucose + glucose=

Answer 7

maltose

Question 8

glucose + fructose=

Answer 8

sucrose

Question 9

glucose + galactose=

Answer 9

lactose

Question 10

name 3 monosaccharides

Answer 10

• glucose
• galactose
  -fructose

Question 11

name 3 disaccharides

Answer 11

• sucrose
• maltose
• lactose

Question 12

name 3 polysaccharides

Answer 12

• starch
• cellulose
• glycogen

Question 13

how is a glycosidic bond formed

Answer 13

A condensation reaction between two monosaccharides

Question 14

what two molecules of make up starch

Answer 14

amylose and amylopectin

Question 15

properties of amylose

Answer 15

• unbranched chain
• contains 1,4 glycosidic bonds
• coiled strucure

Question 16

properties of amylopectin

Answer 16

• branched chain
• contains 1,4 and 1,6 glycosidic bonds
• straight chain

Question 17

Explain why water is a good solvent

Answer 17

• water is a polar molecule
• water surrounds polar molecules allowing them to dissolve
• hydrogen bonds form