With regards to operons, which of the following is incorrect?
A. operons have a promoter that contains an operator
B. are typically controlled by a regulatory gene that is located far from the actual operon
C. results in several different RNA molecules each leading to the protein specified by each gene segment in the operon
D. may be turned on or off
E. may be repressible or inducible
C. results in several different RNA molecules each leading to the protein specified by each gene segment in the operon
You might also like to view...
What is the organism with the longest evolutionary history in this diagram?
a. human b. pig c. snake d. yeast
Match each stage with the events listed
a. sister chromatids move apart b. chromosomes start to condense c. new nuclei form d. all duplicated chromosomes are aligned at the spindle equator________ metaphase________ prophase________ telophase________ anaphase
Which feature is found in DNA?
A) Adenine (A) forms a base pair with cytosine (C). B) The backbone of each strand is composed of alternating sugar and phosphate groups. C) Complementary strands are held together by ionic bonds. D) DNA remains condensed in a short linear form both before and after cell division.
In the laboratory, fruit flies (Drosophila) were artificially selected for the number of bristles on their bodies. One population (R) was selected for low numbers of bristles, a second population (S) for high numbers of bristles.In order for the scientists to artificially select Drosophila for their number of bristles,
A. genetic variation had to be present in the population. B. they had to study the population for millions of years. C. the number of bristles in each Drosophila had to be random. D. they had to induce mutations into their populations of Drosophila. E. dramatic mutations had to be produced by the selection.