Assertion : Sequence of bases in DNA is TGAACCCTT and sequence of bases in m-RNA is CATTAAACC.
Reason: In DNA nitrogeneous bases have hydrogen bonds.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the corret explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and the reason both are false.

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Analyze the Assertion
The assertion states that the sequence of bases in DNA is TGAACCCTT and the sequence of bases in mRNA is CATTAAACC.

1. **Identify the DNA Sequence**: TGAACCCTT
2. **Determine the Complementary DNA Sequence**:
- T (Thymine) pairs with A (Adenine)
- G (Guanine) pairs with C (Cytosine)
- A (Adenine) pairs with T (Thymine)
- C (Cytosine) pairs with G (Guanine)

Therefore, the complementary DNA strand for TGAACCCTT would be:
- A (from T)
- C (from G)
- T (from A)
- G (from C)
- TT (from CC)
- AA (from TT)

Thus, the complementary DNA sequence is ACTTGGAA.

3. **Transcribe to mRNA**:
- Replace T with U (Uracil) when transcribing to mRNA.
- So, the mRNA sequence derived from the complementary DNA strand ACTTGGAA would be:
- A (Adenine)
- C (Cytosine)
- U (Uracil)
- G (Guanine)
- G (Guanine)
- A (Adenine)
- A (Adenine)

Hence, the mRNA sequence is ACUGGUAA.

### Step 2: Analyze the Reason
The reason states that in DNA, nitrogenous bases have hydrogen bonds.

1. **Understanding Hydrogen Bonds**:
- In DNA, the nitrogenous bases (A, T, C, G) are held together by hydrogen bonds.
- A pairs with T through 2 hydrogen bonds, and C pairs with G through 3 hydrogen bonds.

### Step 3: Conclusion
- The assertion is incorrect because the mRNA sequence provided (CATTAAACC) does not match the expected transcription from the complementary DNA strand.
- The reason is correct; however, it does not support the assertion since the assertion is false.

### Final Answer
Both the assertion and the reason are false. Therefore, the correct answer is that both statements are false.

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