How does an allosteric inhibitor work?
What will be an ideal response?
It binds to a second site, causing a conformational change in the enzyme that makes the active site less accommodating to the substrate.
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The protective layer outside of the plasma membrane of the plant cell is called ______
A. chitin B. proteoglycans C. pectin D. the cell wall E. cellulose
Suppose that a mistake made during DNA replication in a cell is not corrected, but instead the
mutation remains in the single strand where it occurred. Then suppose that after the cell divides both daughter cells survive, and those cells then go on to have DNA replication and ultimately cell division. There are now four cells where there once was one cell. Assuming that the mistake was never corrected and that no new uncorrected mistakes occurred, how many of the four cells will have the mutation in their DNA?
a. none b. one c. two d. three e. four
Chytrids are unique among fungi because they are the only ones that have ________
a. symbiotic relationships in lichens b. flagellated cells c. zygospores d. sexual reproduction
How is codominance expressed in an organism?
A) Both of the alleles in a heterozygote are expressed phenotypically in an individual. B) Expression of two different alleles alternates from one generation to the next. C) A heterozygote expresses an intermediate phenotype. D) Offspring exhibit several different phenotypic expressions of a single trait.