Chp 8,9 Flashcards
In what stage of the cell are the cells of a tissue when cell division does not occur?
G1
In what way does DNA polyemerase differ from RNA polymerase?
DNA polymerase requires a primer, RNA polymerase does not.
Which of the following statements correctly describe a typical mammalian messenger RNA?
Messenger RNA has a cap at its 5’ end
Messenger RNA has a poly A tail at its 3’ end
Messenger RNA contains sections that are not translated.
The statement that DNA replication is discontinuous means that
Replication of one of the two strands of DNA is repeatedly re started, and the products are joined to make the final product.
The fungal toxin, a ananitin inhibits eukaryotic RNA polymerase 2. What will be the result when a person eats mushrooms containing a ananitin?
Production of messenger RNA stops.
Which of the following statements about genetic code are correct?
A group f three nucleotides has only one meaning.
An amino acid may be specified by one or more different triplets of nucleotides.
The start signal is translated, but the stop signals are not.
The gene coding for the enzyme triose phosphate isomerase in maize consists of over 3400 base pairs of DNA, but the corresponding messenger RNA is only 1050nucleotiteds in length. What is the reason for this discrepancy?
The whole gene is transcribed, but about two thirds of the resulting RNA IS DISCARDED.
A steroid hormone, like testosterone works by.
Combining with an intercellular hormone receptor, leading to an effect on transcription by interacting with DNA.
Which of the following statements about the genetic code are correct?
A triplet of bases can have only one meaning.
There is only one kind of signal for “start translating here”
Which of the following kinds of RNA are made by copying DNA?
Ribosomal RNA
Transfer RNA
