Praxis II Biology

Category - Biology

Which of the following molecules is found in chromosomes?
I. Protein
II. Nucleic acids
III. Carbohydrates
  1. I only
  2. II only
  3. III only
  4. I and II only
  5. I, II, and III only
Explanation
Answer: D, The molecules that are found in chromosomes are protein and nucleic acids. By content, chromosomes are approximately 50% protein and 50% DNA.

Key Takeaway: Chromosomes are highly complex structures comprised of protein and DNA. The proteins function to give the chromosome its structure, protect the genetic material, and control the activation of genes. The DNA in chromosomes serves as the basis of the genetic material of the body. Chromosomes are made up of chromatin threads, each of which is composed of protein and DNA.
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