Chapter 3: Q. 25 (page 94)
Why is it impossible for humans to digest food that contains cellulose?
Humans cannot digest the food that contains cellulose as they lack the enzymes which can digest cellulose.
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Explain at least three functions that lipids serve in plants and/or animals.
Lactose is a disaccharide formed by the formation of a
________ bond between glucose and ________.
a. glycosidic; lactose
b. glycosidic; galactose
c. hydrogen; sucrose
d. hydrogen; fructose
Mad cow disease is an infectious disease where one
misfolded protein causes all other copies of the protein
to begin misfolding. This is an example of a disease
impacting ____ structure.
a. primary
b. secondary
c. tertiary
d. quaternary
Cholesterol is an integral part of plasma membranes.
Based on its structure, where is it found in the
membrane?
a. on the extracellular surface
b. embedded with the phospholipid heads
c. within the tail bilayer
d. attached to the intracellular surface
Explain what happens if even one amino acid is substituted for another in a polypeptide chain. Provide a specific example.
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