Lab Exam 3

Question 1

What is chemical Digestion

Answer 1

Breakdown of large food molecules into subunits for absorption in the GI tract

Question 2

What are macromolecules

Answer 2

subunits for absorption

Question 3

what are proteins

Answer 3

Amino Acids- Protease

Question 4

What are lipids

Answer 4

Fatty acids-Lipase

Question 5

What are carbs

Answer 5

Polysaccharide-starch -Amylase

Question 6

What is sugar

Answer 6

Monosaccharide-glucose-Amylase

Question 7

What is nucleic acid

Answer 7

DNA-nuclease

Question 8

WHat are enzymes?

Answer 8

Proteins that have a 3D structure. Biological Catalyst that speed up the rate of chemical digestion.

Question 9

3 things enzymes do

Answer 9

Convert substrate to products
Very specific- only work with one type of substrate
work best at physiological pH2.0 or 7.4

Question 10

why is lipid digestion difficult?

Answer 10

Lipids are hydrophobic: they have a phobia of water. Enzyme access to substrate is limited.

Question 11

What is the solution for lipid digestion?

Answer 11

Add a chemical that dissolves lipid in water. Bile salts surround the lipid molecules, allowing them to dissolve in water.

Question 12

What is the enzymatic reaction to form triglycerides

Answer 12

Lipids + H2O——->Triglycerides