Which of the following descriptions is consistent with the behavior of a cell that lacks a protein required for a checkpoint mechanism that operates in G2?
(a) The cell would be unable to enter M phase.
(b) The cell would be unable to enter G2.
(c) The cell would enter M phase under conditions when normal cells would not.
(d) The cell would pass through M phase more slowly than normal cells
(c) Normal cells arrest at the G2 checkpoint if DNA replication is incomplete or DNA is damaged. Cells without this mechanism may enter M phase with unreplicated or damaged DNA, whereas normal cells would not.
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_____ are mycorrhizal fungi with hyphae that grow into a root cell and branch inside it
a. Glomeromycetes c. Zygote fungi b. Chytrids d. Club fungi
During DNA replication in a typical human cell,
A) only one origin of replication exists for each chromosome. B) multiple origins of replication function consecutively. C) multiple origins of replication function simultaneously. D) the origins of replication are at the centromeres. E) the origins of replication are at the telomeres.
If the DNA coding sequence was CGA?ATC,
the mRNA would be
a. GCU?UAG. b. AUC?CGA. c. UAG?GCU. d. UAG?CGU. e. none of these
A unique feature of the ________ that distinguishes them from other bacteria is their ability to move through highly viscous liquids.
Fill in the blank(s) with the appropriate word(s).