ATP is usually referred to as the energy currency of a cell. It is chemically.......(A)....... and the set of elements.............(B)........... forms its structure.

Options

A. `{:((A),"(B)"),("Nucleoside","C,H,O,N, and P"):}`
B. `{:((A),"(B)"),("Vitamin derivative ","C,H,O,N, and P"):}`
C. `{:((A),"(B)"),("Nucleotide","C,H,O,N, and P"):}`
D. `{:((A),"(B)"),("Vitamin derivative ","C,H,O,S, and P"):}`

Answer

To solve the question regarding ATP, we need to fill in the blanks with the appropriate terms that describe its chemical nature and the elements that form its structure.

### Step-by-Step Solution:

1. **Identify the Chemical Nature of ATP**:
- ATP (Adenosine Triphosphate) is known to be a nucleotide.
- Nucleotides are the building blocks of nucleic acids and consist of a nitrogenous base, a sugar, and one or more phosphate groups.
- Therefore, the first blank (A) can be filled with "a nucleotide".

2. **Identify the Elements that Form the Structure of ATP**:
- The structure of ATP includes:
- A nitrogenous base (adenine),
- A sugar (ribose),
- Three phosphate groups.
- The elements that are present in ATP include:
- Carbon (C),
- Hydrogen (H),
- Oxygen (O),
- Nitrogen (N),
- Phosphorus (P).
- Thus, the second blank (B) can be filled with "carbon, hydrogen, oxygen, nitrogen, and phosphorus".

### Final Answer:
ATP is usually referred to as the energy currency of a cell. It is chemically **(A) a nucleotide** and the set of elements **(B) carbon, hydrogen, oxygen, nitrogen, and phosphorus** forms its structure.