Chapter 3

DNA

A shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture

4

A single carbon atom can form a maximum of _____ covalent bond(s)

lack the enzyme needed to break down cellulose

Humans and other animals cannot digest wood because they

Hydrogen, carbon, nitrogen, oxygen, phosphate

The five most abundant elements in DNA and RNA are:

hydrogen, carbon, nitrogen, oxygen

The four most abundant elements in the human body are:

Long term energy storage, hormones (steroids)

What are the roles of lipids in the human body?

Saturated fats contain the maximum number of hydrogens along the tails

Which of the following statements about saturated fats is true?

A very large molecule composed of many smaller monomers linked together

what is a polymer?