Question

question 1
1 pts
the amino group in an amino acid is:
○ nh₃⁺.
○ coo⁻.
○ symbolized by the letter r.
○ so₂.

question 2
1 pts
which energy - releasing or energy - transferring molecule does not contain a nucleotide?
○ fad
○ creatine phosphate
○ nad
○ atp

question 3
1 pts
which of the following is not true of carbohydrates?
○ they include substances commonly called sugars.
○ they are the bodys primary source of energy.
○ they are a part of both dna and rna.
○ all of the above are true of carbohydrates.

Explanation:

• Question 1: An amino - acid has an amino group ($NH_3^+$), a carboxyl group ($COO^-$), a hydrogen atom and an R - group. The amino group is $NH_3^+$.
• Question 2: FAD, NAD and ATP all contain nucleotides. Creatine phosphate is an energy - storing molecule that does not contain a nucleotide.
• Question 3: Carbohydrates include sugars, are the body's primary energy source, and are part of DNA and RNA (in the form of ribose or deoxyribose).

Answer:

Question 1: $NH_3^+$
Question 2: Creatine phosphate
Question 3: All of the above are true of carbohydrates.