Which of the following statements is false?
(a) Mitotic Cdk must be phosphorylated by an activating kinase (Cak) before it is active.
(b) Phosphorylation of mitotic Cdk by the inhibitory kinase (Wee1) makes the Cdk inactive, even if it is phosphorylated by the activating kinase.
(c) Active M-Cdk phosphorylates the activating phosphatase (Cdc25) in a positive feedback loop.
(d) The activating phosphatase (Cdc25) removes all phosphates from mitotic Cdk so that M-Cdk will be active.
(d)
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Review the pedigree shown in Figure 17.7 and choose the most accurate statement about the inheritance of an X-linked recessive mutation
A. For rare X-linked traits, most of the affected individuals are males. B. Daughters of affected males are always affected. C. The offspring of an affected male are usually affected. D. The sons of the sisters of affected males will always be affected. E. The brothers of affected males are always affected.
In the PCR process, which of the following
molecular bonds of DNA are disrupted at high temperatures?
a. ionic bonds b. hydrogen bonds c. polar covalent bonds d. nonpolar covalent bonds e. glycosidic bonds
Heterotrophic protists are called _________
Fill in the blank(s) with the appropriate word(s)
In bacteria, which topoisomerase is responsible for unlinking catenated chromosomes after replication?
A. topoisomerase I B. topoisomerase II C. topoisomerase III D. topoisomerase IV E. topoisomerase V