Which of the following structural features is common to cellulose, chitin, and peptidoglycan?

a) they can all form bonds between polymer chains that stabilize parallel strands.
b) they are all composed of glucose in either the α or β form.
c) they all contain peptide bonds.
d) they are all composed of highly branched fibers.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.