Question

1. this process best represents

+ + + x
starch

a. the bonding of amino acids to form a starch molecule.
b. the digestion of amino acids to form a starch molecule.
c. the bonding of simple sugars to form a starch molecule.
d. the digestion of simple sugars to form a starch molecule.

1. life can exist under frozen surfaces in polar seas because... *

a. water is less dense as a solid.
b. water is a terrific solvent.
c. water has a high surface tension.
d. water has a high specific heat.

Explanation:

1. Starch is a polysaccharide made up of simple - sugar monomers (glucose). It is formed by the bonding of these simple sugars through glycosidic bonds, not by amino - acids (which form proteins). Digestion breaks down larger molecules into smaller ones, so it cannot be a digestion process to form starch.
2. Water is less dense as a solid (ice) than as a liquid. This causes ice to float on the surface of water in polar seas, creating an insulating layer that allows life to exist beneath the frozen surface.

Answer:

1. C. The bonding of simple sugars to form a starch molecule.
2. A. Water is less dense as a solid.