Question

The first level of DNA organization in a eukaryotic cell is maintained by which molecule?

a. cohesin

b. condensin

c. chromatin

d. histone

Short answer

The correct option is D.

Step-by-step solution

Step. 1 Introduction

DNA is comprised of two antiparallel strands comprising nucleic acids, each one contains two linked and opposing nucleic acids known as DNA bases. Every strand of DNA is coiled across histones, producing nucleosome complexes, in order for that to fit within the small nucleus of the cell. Chromosome is made mainly of nucleosomes that pack together.

Step. 2 Explanation for correct answer

The genetic material DNA in eukaryotic cells is linear and firmly bonded to specific proteins called histones. Histones are basic proteins with a lot of lysine as well as arginine residues that have a lot of evolutionary stability

Step. 3 Explanation for incorrect answer

Option A. Sister chromatid stability, reassortment, and DNA folding are all facilitated by cohesin, a protein complex.

Option B. Condensins comprise huge structures that have a key role in mitosis and meiosis chromosomal assembly and division.

Option C. Chromatin is the substance that comprises a chromosome, which is composed of Deoxyribonucleic acid and protein.