Prior to the elucidation of the genetic code, prominent scientists, including francis crick, had predicted that each mrna codon, coding for one of the 20 amino acids, needed to be at least three nucleotides long. why is it not possible for codons to be any shorter?

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

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.