Read the given Statements and select the CORRECT one.

Options

A. DNA is preferred genetic material over Proteins because amino acids in proteins cannot be arranged variously to from long chains .
B. In microsatellite DNA , repetitive nucleotide sequence of 10-15 bp units are flanked by restriction sites.
C. RNA renaturation after melting is slow than DNA renaturation
D. Noncoding DNA sequence code for tRNA and rRNA

Answer

To solve the question regarding the correctness of the given statements about genetic material, we will analyze each statement one by one.

### Step 1: Analyze the First Statement
**Statement:** DNA is a preferred genetic material more than protein because amino acids of protein cannot be arranged in the form of long chains.

- **Analysis:** The first part of the statement is correct; DNA is indeed the preferred genetic material over proteins. However, the reason provided is incorrect. Proteins can form long chains (polypeptides) made of amino acids. The real reasons DNA is preferred include its ability to replicate itself, its stability, and its capacity for mutation and expression of Mendelian characters.

**Conclusion:** This statement is incorrect.

### Step 2: Analyze the Second Statement
**Statement:** In microsatellite DNA, the repetitive sequence of 10 to 15 base pairs are flanked from the restriction site.

- **Analysis:** Microsatellites typically consist of repeating units of 2 to 4 base pairs. If the repetitive sequence exceeds 10 base pairs, it is classified as a mini-satellite. Therefore, the statement incorrectly defines microsatellite DNA.

**Conclusion:** This statement is incorrect.

### Step 3: Analyze the Third Statement
**Statement:** After melting, the renaturation of RNA is slower than that of DNA.

- **Analysis:** This statement is correct. DNA, due to its stability and the presence of repeated sequences, renatures faster than RNA. RNA has fewer repeated sequences and is less stable, leading to slower renaturation.

**Conclusion:** This statement is correct.

### Step 4: Analyze the Fourth Statement
**Statement:** The non-coding sequences of DNA are coded for tRNA and rRNA.

- **Analysis:** Non-coding sequences do not code for any proteins or RNA, including tRNA and rRNA. tRNA and rRNA are essential for protein synthesis, but they are not derived from non-coding regions. Non-coding DNA sequences are often referred to as "junk DNA" and do not have coding functions.

**Conclusion:** This statement is incorrect.

### Final Conclusion
The only correct statement among the options provided is the third one: "After melting, the renaturation of RNA is slower than that of DNA."