The prostate gland secretes what for what purpose?
What will be an ideal response?
Answer: Urethra secretes to nutralize the PH
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A transposon is
A) a DNA segment that can insert itself at one or more sites in a genome. B) a "jumping gene." C) a DNA segment that may cause mutations in genes or chromosomal rearrangements. D) a mobile genetic element that may or may not leave a copy of itself in its original site when it moves to a new site. E) All of these
Menopause normally occurs around age 60, when women stop menstruating and their ovaries are no longer working.
Answer the following statement true (T) or false (F)
Imagine that you and your colleagues are working in a lab to develop a protein synthesis system for a new type of synthetic cell. During your brainstorming sessions, you propose that polycistronic mRNA would be much more useful than mRNA that is only translated into one protein. This would allow for multiple proteins necessary for a particular function to be translated together. One of your colleagues says that is a good idea, but if you decide to go with polycistronic mRNA, you'd better make sure to use a prokaryotic translation system. Why might it be problematic to use a eukaryotic translation system with polycistronic mRNA?
a. Eukaryotic start and stop codons are different from prokaryotic start and stop codons. b. Introns would always prevent translation of the mRNA. c. Prokaryotic ribosomes do not detach from mRNA when they reach a stop codon d. Eukaryotic ribosomes initiate translation by binding to the 5?-cap, which is only at the end of the mRNA.
Endoplasmic reticulum (ER) with many ribosomes attached is called ________ ER, whereas endoplasmic reticulum that is mostly devoid of ribosomes is called ________ ER.
What will be an ideal response?