It’s difficult to define science. We do have a set of characteristics that we can use to describe science though. List the five characteristics: 1. 2. 3. 4. 5.

Disaccharides include what sugar molecules. true or false?

Approximately how many times does an average human heart beat in a lifetime?

Which one of the following is true of trnas? a) trnas are double-stranded. b) each trna binds a particular amino acid. c) there are four types of trna. d) trnas carry special sequences known as codons. e) all of the above