Posted by Christine on Saturday, July 22, 2006 at 2:11pm.
Please help me out with this:
You have just located a nucleolus in the nucleus. You are able to excise thsi area of the genome and express the genesof 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?
I. tRNA
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.
Read the quote below and choose the answer you think is right. Post it here and I'll check it for you.
"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)."
source:
http://en.wikipedia.org/wiki/Nucleolus
No one has answered this question yet.
Answer this Question
Related Questions
Bio Bio - You have just located a nucleolus in the nucleus. You are able to ...
nucleus true facts - is the nucleus always found in the center of the cell? I ...
Probability - 4.3. In a certain college town, 27.5 percent of the students ...
AP Bio - Please take a look at my AP bio question from last night. I still need ...
Bio - I have a 67% in bio and our final exam is worth 30%. how much would I have...
application - i'm writing a officer aplication and need to write a bio, how ...
bio - last question about bio Explain the statement below: “ Biological ...
bio - what are significants of Evolution of Eukaryotes ?
Bio - What is the relationship between the size of mammals and their surface ...
Science - bio. - Why does the nucleus of a plant cell in the side of the cell ?
For Further Reading
