Biology unit 4

Question 1

Glucose

Answer 1

• C6H12O6
• used to produce energy from respiration
• plants transport sucrose, which is then converted into glucose and used for respiration

Question 2

Chains of glucose

Answer 2

Cellulose - plants use to make cell walls
Starch - plants use to store energy
Glycogen - animals use to store energy in liver

Question 3

Testing for reducing sugars

Answer 3

• Benedict’s solution
• when heated it turns: blue - green - yellow - orange - red

Question 4

Testing for starch

Answer 4

• iodine
• it turns: orange/brown - blue/black

Question 5

Fat function

Answer 5

• energy dense molecules
• fat stored under the skin is called adipose tissues (insulates body)
• used to produce cell membranes and some hormones
• plants store oil in their seeds

Question 6

Testing for fats

Answer 6

• ethanol emulsion test
• fat is present = cloudy