Which of the following would not be included as a threat to construct validity?

What is the role of the institutional review board (IRB) in protecting human subjects?

Which best describes a no-treatment control group?

The four steps involved in building a survey questionnaire include all of the following except:

You have discovered a novel protein BUZZKILL that inhibits the activation of M-Cdk. However, you later discover that M-Cdk directly inhibits the activity of BUZZKILL! The result is that once the first few M-Cdks in a cell are activated, those activated M-Cdks will inhibit BUZZKILL proteins, resulting in more rapid activation of other M-Cdks. Activated M-Cdk’s inhibition of BUZZKILL is an example of:

In experimental design, subjects are assigned to one of two or more condition groups based on multiple criteria as selected by the investigator (e.g., subject demographics).

In a migrating neutrophil, the GTPases Rac and Rho are active in different areas of the cell, and each antagonizes the other. What would happen if Rac STOPPED antagonizing Rho?

TRUE or FALSE: During necrosis, the cell disassembles its cytoskeleton, nuclear envelope and DNA in a self-contained manner. It frequently does this in response to developmental signals. 

The leading edge of a cell (the area of a migrating cell that is closest to the direction of movement) is pictured in the diagram below, with two structures within it labeled as A) and B). What are each of those structures called?  

Name the E3 ligase that ubiquitinates M-cyclins, tagging them for destruction in a proteasome.