Question

1. Describe the relationship between chromosomes, chromatin and DNA. (3 pts)
2. Describe the relationship between chromosome locus and gene. (3 pts)
3. Why chromatin filaments they appear grainy electron microscope? (4 pts)

Answer 1

1. DNA is a double-stranded molecule which is composed of two polynucleotide chains wth formation of double-helix structure. Chromatin is composed of DNA wrapped around histone proteins. Chromosome represents high-level packaging of 30-nm fibers of chromatin.
2. The chromosome locus is a specific place of gene on this chromosome.
3. It depends on the density of chromatinfilaments.