Read the following statements and find out the incorrect statement.

Options

A. Oil have lower melting point (e.g. gingely oil) and hence remain as oil in winters
B. Adenosine, guanosine, cytosine, uridine and thymidine are nucleosides
C. Adenylic acid, deoxy thymidylic acid, guanylic acid uridylic acid and cytidylic acid are nucleotides
D. Nucleic acids like DNA and RNA consists of nucleotides only

Answer

To solve the question of identifying the incorrect statement from the provided options, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "Oil has a lower melting point."
- This statement is correct. Oils, particularly those that are unsaturated, have lower melting points due to the presence of carbon-carbon double bonds, which prevent tight packing of molecules.

- **Statement 2**: "Adenosine, guanosine, cytosine, uridine are nucleosides."
- This statement is correct. Adenosine and guanosine are indeed nucleosides, which consist of a nitrogenous base (adenine or guanine) attached to a sugar (ribose).

- **Statement 3**: "Adenylic acid, deoxythymidylic acid, guanylic acid, butyric acid, and cytidylic acid are nucleotides."
- This statement is partially correct. Adenylic acid (AMP), deoxythymidylic acid (dTMP), guanylic acid (GMP), and cytidylic acid (CMP) are nucleotides. However, butyric acid is not a nucleotide; it is a short-chain fatty acid. Therefore, this statement is incorrect.

- **Statement 4**: "These nucleic acids like DNA and RNA consist of nucleotides only."
- This statement is correct. DNA and RNA are polymers made up of nucleotides, which include a phosphate group, a sugar, and a nitrogenous base.

2. **Identifying the Incorrect Statement**:
- Based on the analysis, the incorrect statement is **Statement 3** because it incorrectly includes butyric acid as a nucleotide.

### Final Answer:
The incorrect statement is: **"Adenylic acid, deoxythymidylic acid, guanylic acid, butyric acid, and cytidylic acid are nucleotides."**

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