A cell contains eight chromosomes at the end of prophase I. How many chromosomes will be in each daughter cell at the end of prophase II?
A) 4 B) 32 C) 8 D) 16
Answer: A
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Kinases are enzymes that can phosphorylate (transfer phosphate groups onto) macromolecules such as proteins. A particular kinase, Kinase 1 is known to promote cell division. It promotes cell division by phosphorylating Protein X. Phosphorylation of Protein X activates Protein X. Once activated, Protein X stimulates the production of other proteins such as Protein Y and Z that directly promote cell division. In order to function, Kinase 1 requires the presence of Metal A. However, in the presence of Protein A, Kinase 1 is nonfunctional. From the description, what is considered a cofactor of Kinase 1?
A. Protein X B. Protein Y C. Protein Z D. Metal A E. Protein A
The implement of what piece of modern technology led to the discovery of living organisms in the dark, deep waters of the world ocean?
a. none of these choices b. Transatlantic television cables c. Transatlantic dredging ships d. Transatlantic telegraph cable
When a neuron is at rest
a. there is a voltage difference across the membrane of about 70 millivolts. b. the interior is negatively charged. c. it is not responding to a stimulus. d. the fluid outside the membrane has more sodium and less potassium than the cytoplasm. e. all of these occur.
Which type of cell has a nucleus and membrane bound organelles
What will be an ideal response?