Plant mitochondrial genomics: Approximately how large is the mitochondrial genome of melon (Cucumis melo) in kilobases (kb)?

Introduction / Context:
Plant mitochondrial genomes vary enormously in size and structure compared with animals. Melon (Cucumis melo) is noted for having an unusually large mitochondrial genome among plants. This question targets familiarity with approximate genome scale.

Given Data / Assumptions:

• Sizes are presented in kilobases (kb), where 1000 kb = 1 Mb.
• Plant mtDNA may include repeats, multipartite structures, and foreign DNA segments.
• We are selecting the closest widely cited approximate size.

Concept / Approach:
Reports place melon mitochondrial DNA in the multi-megabase range, far exceeding animal mtDNA (~16–20 kb). A commonly referenced figure is about 2.4 Mb (≈ 2400 kb), illustrating the genomic expansion and complexity of plant mitochondria.

Step-by-Step Solution:

Verification / Alternative check:
Comparative genomics literature lists Cucumis melo mtDNA around 2.4 Mb, consistent with the selected option.

Why Other Options Are Wrong:

Common Pitfalls:
Assuming plant mtDNA sizes resemble those of animals; underestimating structural complexity and repeats in plant mitochondria.

Final Answer:
2400 kilobase.