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
D
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The term neoplasia refers to cell accumulation. Neoplasia can be caused by
A. increased apoptosis. B. decreased apoptosis. C. blood clots. D. cell membrane interactions. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about apoptosis? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The formation of a covalent bond between two adjacent thymines is caused by
A. mustard gas. B. alkylating agents. C. microwave radiation. D. UV radiation.
Expansins are proteins that loosen up cell walls so cells can elongate. Auxin is thought to activate expansins by
A) aligning cellulose microfibrils. B) activating protons pumps to decrease pH in a section of the cell wall. C) depositing lignin molecules between cellulose fibrils. D) increasing turgor pressure. E) increasing pectin hydration.
Two lines of chromosomes are present at the metaphase plate during _______.
a) metaphase II b) metaphase c) metaphase I