Question

1. in the context of eukaryotic chromosomes, which statement most accurately describes the composition of chromatin?

a. primarily rna with minor protein components
b. dna and proteins that provide structural organization
c. solely dna without any associated molecules
d. proteins and lipids forming a protective sheath

1. most eukaryotic species are diploid, meaning they have:

a. one set of chromosomes, like in gametes
b. circular chromosomes without homologs
c. variable numbers of chromosomes per cell
d. two sets of chromosomes, with homologs in pairs

Explanation:

1. Chromatin is made up of DNA and histone proteins. These proteins help in organizing the DNA. Option A is wrong as RNA is not the main component. Option C is incorrect as DNA is associated with proteins. Option D is wrong as lipids are not part of chromatin composition.
2. Diploid means having two sets of chromosomes (one from each parent) which are homologous and exist in pairs. Option A describes haploid (like gametes). Option B is for prokaryotes (circular chromosomes). Option C is incorrect as diploid has a fixed number (two sets) of chromosomes per cell.

Answer:

1. B. DNA and proteins that provide structural organization
2. D. Two sets of chromosomes, with homologs in pairs