Enzymes, Nutrients, Digestion

In which organ(s) will protein be broken down?

• Mouth

• Stomach

• Small Intestine

• Pancreas

Which is true about enzymes at optimum temperature?

• The kinetic energy is the highest.

• The movement of enzymes and substrates are the greatest.

• The rate of formation of enzyme-substrate complex is highest.

• It is at 37 degrees celsius.

The optimum pH of amylase is 7. What happens when pH is at 3 instead?

• Enzymes are not moving as much, so rate of reaction drops.

• Enzymes are denatured, so rate of reaction drops.

• Substrates are denatured, so rate of reaction drops.

• The acid digests the substrate, so rate of reaction increases.

Which of the following does not happen in the small intestine?

• Digestion of starch

• Digestion of proteins

• Absorption of nutrients into bloodstream

• None of the above

Which are considered physical digestions?

• Mastication

• Churning of stomach

• Emulsification of fats

• Breaking of peptide bonds

Which is not a feature of ALL biological catalysts?

• Substrate-specific

• Is not altered by the reaction

• Only works in certain environments

• Made of protein

Why does the pH in the mouth decreases after eating?

• The food was acidic

• Bacteria feed on sugar and produce acids

• Amylase digests starch and produces acids

• The pH does not decrease after eating

When this forms on your teeth, it can cause cavities

• Enamel
• Crown
• Plaque
• Fluoride 

What is the hard outer covering of the tooth called?

• pulp
• cementum
• dentine
• enamel

This is the sensitive part of your tooth

• Root

• Nerve

• Enamel

• Dentine