The level of specific mRNA, and therefore the expression of a given gene in a particular ecosystem, can be evaluated in the environment using in situ reverse transcriptase (ISRT)-FISH.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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________ can be detected through a blood test that detects a specific antigen called PSA

Fill in the blank(s) with correct word

Biology & Microbiology

_____________ selection favors organisms with phenotypes that are at one extreme relative to the average phenotype.

a) Disruptive b) Stabilizing c) Intermittent d) Directional e) Sexual

Biology & Microbiology

In order for transcription to be initiated

A. DNA polymerase must have access to the RNA and must also be capable of binding to the gene's promoter. B. DNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. C. RNA polymerase must have access to the DNA double helix and also must be capable of binding to the gene's operator. D. RNA polymerase must have access to the DNA double helix and must also be capable of binding to the gene's promoter. E. RNA ligase must have access to the DNA double helix and must also be capable of binding to the gene's promoter.

Biology & Microbiology

Some anti-cancer drugs block signal transduction pathways activated by growth factors. Which of the following would be a good target for such a drug?

A. An inhibitor of a protein kinase cascade. B. An inhibitor of Ca2+ release C. An inhibitor of adenylyl cyclase. D. An inhibitor of phospholipase C. E. A phosphatase inhibitor.

Biology & Microbiology