21-24 Nucleosomes are located in the A) nucleus and are attached to the ends of

Question

21-24

Nucleosomes are located in the A) nucleus and are attached to the ends of DNA strands B) nucleus and are composed of DNA and protein C) nucleus and are associated with the nuclear membrane D) nucleus and are composed of mRNA and protein E) nucleus and are associated with the nucleolus and aid in ribosome synthesis If a cell has 32 chromosomes prior to S and undergoes mitosis followed by daughter cell will have how many chromosomes? A) 64 B) 32 C) 16 D) 8 Interleukins and erythropoietin are A) growth factors B) CDKs C) cyclins D) TSGs How does a nucleus in G2 differ from one in the G1 phase? A) G2 has double the amount of DNA as G1. B) DNA synthesis occurs only in the G1 phase. C) Inactive cells are arrested only in the G2 phase. D) During G2, the cell prepares for S phase. E) All of the above

Explanation / Answer

21. option B. nucleosomes are present in the nucleus and composed of DNA and protein. proteins are histone proteins onto which DNA wrap

22. daughter cell will have the same number of chromosome as the parent cells.

So the answer is option B 32

23 interleukins and Erythropoietin are the growth factor.

Erythropoietin regulate red blood cell formation and interleukins are glycoproteins that regulate immune responses.

so the answer is the option A growth factor

24. G2 phase is followed by S phase in which DNA replication takes place

so the correct option is A. G2 has double the amount of DNA as G1

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