Bio Bio

You have just located a nucleolus in the nucleus. You are able to excise this area of the genome and express the genes of this chromosomal fraction in vitro (in a test tube). What genes would you most likely find expressed from this portion of the cell's DNA?

II. ribonsomal
III. cyclin
IV. cyclin dependent kinase

I am leaning more toward "IV" becasue cyclin denpendent kinases exhibit enzymatic activity only when they are bound to an activator (e.i. cyclin). Do you think my choice is correct.

After reading your comments below, I now think the answer has to be “II” “ribosomal”. Am I right?

The main role of the nucleolus is considered to be ribosome biogenesis, since its fundamental component rDNA codes for preribosomal RNA. Briefly, during synthesis of the rRNA, nucleotide modifications are made by small nucleolar RNPs (snoRNPs), and a number of proteins become associated with the rRNA transcript. The transcript is cleaved to separate the mature rRNAs, which leave for the cytosol through nuclear pores. These nuclear pores are known as the Nuclear Pore Complex (NPC)."

Yes you are now correct

i am a student who leave the third word i wan suporting at the side of learning so what you can do for me

In the future, post your questions with "Post a New Question" rather than adding it as a response to another question.

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I hope this helps. Thanks for asking.

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