**Core Concept**
Satellite DNA refers to a type of repetitive DNA sequence that is dispersed throughout the genome and is often found in tandem arrays. These sequences are typically short and are composed of repeating motifs, such as AT-rich sequences. Satellite DNA is distinct from other types of repetitive DNA, such as minisatellites and microsatellites.

**Why the Correct Answer is Right**
Satellite DNA is transcriptionally inactive, meaning it is not actively expressed as RNA. This is in contrast to other types of genes that are transcribed into mRNA and translated into proteins. The inactivity of satellite DNA is thought to be due to its location in heterochromatic regions of the genome, which are characterized by dense packaging of DNA and low levels of gene expression. The transcriptional inactivity of satellite DNA is also supported by the lack of detectable RNA polymerase activity in these regions.

**Why Each Wrong Option is Incorrect**
**Option A:** Repeated DNA sequences in tandem is a characteristic of satellite DNA, which is composed of short, repetitive motifs that are often found in tandem arrays.

**Option B:** Satellite DNA is indeed clustered around centromeres, which are the regions of the chromosome that attach to the spindle fibers during cell division. The repetitive nature of satellite DNA makes it an ideal candidate for forming the centromere.

**Option C:** Satellite DNA is also found clustered around telomeres, which are the regions of the chromosome that cap the ends of the chromosome and protect them from degradation. The repetitive nature of satellite DNA makes it an ideal candidate for forming the telomere.

**Option D:** This option states that satellite DNA is transcriptionally active, which is incorrect. Satellite DNA is transcriptionally inactive, as discussed above.

**Clinical Pearl / High-Yield Fact**
One important fact to remember is that satellite DNA is often found in heterochromatic regions of the genome, which are characterized by dense packaging of DNA and low levels of gene expression. This is in contrast to euchromatic regions, which are less densely packed and are characterized by high levels of gene expression.

**✓ Correct Answer: D. Transcriptionally active**