The protein complexes that develop on either side of the centromere are known as:

• A. centrosomes
• B. chromatids
• C. kinetochores
• D. telomeres

Answer: (C)

Verified step by step guidance

1. Understand the structure of a chromosome, which includes the centromere, chromatids, telomeres, and associated protein complexes.
2. Recall that the centromere is the region where sister chromatids are held together and where spindle fibers attach during cell division.
3. Identify the protein complexes that form on either side of the centromere; these complexes serve as attachment points for spindle microtubules.
4. Recognize that these protein complexes are called kinetochores, which play a crucial role in chromosome movement during mitosis and meiosis.
5. Differentiate kinetochores from other terms: centrosomes are microtubule organizing centers, chromatids are the duplicated chromosome arms, and telomeres are the ends of chromosomes.