Which of the following accounts for the negative
control of operons?
a. promoters
b. repressors
c. structural genes
d. operators
e. all of these
Answer: b
You might also like to view...
As long as a cell is alive, it replaces patches of its plasma membrane and add new membrane proteins. How does this occur?
What will be an ideal response?
How did Meselson and Stahl rule out the conservative model of DNA replication using equilibrium density gradient centrifugation?
What will be an ideal response?
The accompanying sketch depicts a cell from an organism in which 2n = 2 and each chromosome is metacentric
(a) Circle the correct stage for the cell in this sketch: anaphase of mitosis anaphase of meiosis I anaphase of meiosis II telophase of mitosis (b) Given that each G1 nucleus from this organism contains 16 picograms of DNA, how many picograms of chromosomal DNA would you expect in the cell shown here?
Choose the most common human disorders that are the result of abnormalities in chromosome number.
What will be an ideal response?