23-24 Biology: b) Lipids, Protein Folding, Enzymes, Digestive

What element(s) are primarily found in hydrophobic R-groups? (mark all that apply)

• H

• C

• O

• N

If a polypeptide chain is placed in water, where would hydrophobic groups go?

• Towards the outside edges

• Towards the inside middle

• Both outside and inside

• Depends where the covalent bonds are

What would be a factor in determining the final shape of a protein?

• Temperature of the solution the protein is in

• Number of carbohydrates present

• How many of the same protein is present

• How many different proteins are present

What type of lipid is in the image?

• Trans-unsaturated

• Cis-unsaturated

• Trans-saturated

• Cis-saturated

Which food is likely to NOT contain trans fats?

• Store-bought fish

• Store-bought pastries

• Store-bought fries

• Store-bought popcorn

Enzymes speed up reactions by lowering its ____.

Denaturing an enzyme would cause the ____ to change, causing the substrate unable to bind.

Lactase is combined with lactose to run its reaction. What is the substrate(s)? (mark all that apply)

• Lactase

• Lactose

• Glucose

• Galactose

A reaction tube contains lactase and lactose. It is sealed off with a balloon. What would you expect to find in the test tube? (mark all that apply)

• Lactase

• Glucose

• Galactose

• Inflated balloon

Which organ(s) actively conduct mechanical digestion? (mark all that apply)

• mouth

• esophagus / epiglottis

• stomach

• small intestine