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 the substrate of Kinase 1?
A. Protein X
B. Protein Y
C. Protein Z
D. Metal A
E. Protein A
A
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Celiac disease is an autoimmune disorder which destroys the microvilli of the small intestine. Vitamin B12 can be absorbed by passive diffusion across the microvilli of the small intestine. Consider a patient who has had 10% of their microvilli destroyed. If the concentration of vitamin B is 0.6 pg/ml inside the lumen of the small intestine and 0.3 pg/ml on the inside of an epithelial cell, how is the diffusion rate of vitamin B altered in this patient?
A. It is reduced by 10%. B. It is reduced by .003%. C. It is increased by 10%. D. It is reduced by .3%. E. It is increased by .3%.
The role of maternal effect genes in Drosophila is to:
a. code for the production of yolk proteins. b. prepare the female fly for reproduction. c. control the early stages of Drosophila development. d. control the development of the pupa. e. control the shape and size of the eggs produced.
The bacterium that causes cholera is capable of living independently in freshwater. As a consequence, cholera epidemics primarily involve (animal/nonliving/zoonotic) reservoirs
What will be an ideal response?
Which value of narrow-sense heritability (h2 ) indicates a selection will have a significant impact in altering the initial population?
A) 20 B) 0.20 C) 0.99 D) 99