Question

The biomolecules which contain a nitrogenous base in their structure:
(A). Adenosine triphosphate (ATP)
(B). Uridine diphosphogalactose
(C). Cytidine 5'-triphosphate
(D). CDP-diacylglycerol
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A), (C) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Any biomolecule containing "Adenosine", "Uridine", "Cytidine", "Guanosine", "Thymidine", or their abbreviations (AMP, UDP, CDP, CTP) contains a purine or pyrimidine nitrogenous base.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Nitrogenous bases are planar, heterocyclic, nitrogen-containing molecules (purines and pyrimidines) that serve as key building blocks of nucleotides and nucleotide derivatives.

Step 2: Detailed Explanation:
- ATP (A): Contains the purine nitrogenous base adenine linked to ribose and three phosphate groups.
- Uridine diphosphogalactose (B): An activated nucleotide-sugar containing the pyrimidine nitrogenous base uracil.
- Cytidine 5'-triphosphate, CTP (C): Contains the pyrimidine nitrogenous base cytosine linked to ribose and three phosphate groups.
- CDP-diacylglycerol (D): An activated phospholipid intermediate containing the pyrimidine nitrogenous base cytosine linked to ribose and diphosphate.
Therefore, all four biomolecules contain a nitrogenous base in their chemical structures.

Step 3: Final Answer:
The correct option is (C).