Four of the five answers listed below belong to the same category of structures. Select the exception

a. blastocyst
b. amnion
c. allantois
d. yolk sac
e. chorion


a

Biology & Microbiology

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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 the substrate of Kinase 1? A. Protein X B. Protein Y C. Protein Z D. Metal A E. Protein A

Biology & Microbiology

Using specific examples, explain why it is sometimes impossible to satisfy Robert Koch's postulates

What will be an ideal response?

Biology & Microbiology

A mass extinction, perhaps caused by a large asteroid hitting Earth near the Yucatan peninsula in the Cretaceous period, produced_____________, which created uninhabitable conditions.

A. active tectonic plate movements that rapidly repositioned continental plates B. All of the answer choices are correct. C. massive volumes of soot, and triggered major climate changes D. forest and range fires over hundreds of years E. a large numbers of volcanic eruptions for millions of years

Biology & Microbiology

This arthropod is the vector for Lyme disease

a. spider b. tick c. wasp d. mosquito e. mites

Biology & Microbiology