Question

question 25
a.
h₂n - c - c - oh
r
b.
c.
d.
which of the above structures represent a carbohydrate?

Explanation:

• Structure A: Represents an amino acid (has amino group \( -NH_2 \) and carboxyl group \( -COOH \)).
• Structure B: Follows the general formula of carbohydrates \( (CH_2O)_n \). It has multiple hydroxyl (\( -OH \)) groups and a carbonyl - like structure (in the ring form, which is a common form for monosaccharides).
• Structure C: Represents a nucleotide (has a nitrogen - containing base, a pentose sugar, and a phosphate group is not shown here but the base and sugar part is characteristic of nucleotides).
• Structure D: Represents a hydrocarbon (only has carbon and hydrogen atoms).

Answer:

B.