Essay Set 2: Essay 4. Describe the self-assembly of microtubule filaments including factors that influence subunit addition and loss, filament polarity within a cell, and overall microtubule structure. Identify the importance of microtubule assembly-disassembly dynamics to cell function and one cellular mechanism to prevent these dynamics. Essay 5. The E. coli lac operon is a classic example of gene regulation. Provide a general definition of an ‘operon’. Identify the genes encoded by the lac operon and their activity/cellular functions. Identify the gene regulatory proteins that control expression of the lac operon, the small molecules that regulate their activity, and the cellular conditions that influence their DNA binding activities. Essay 6. Outline the molecular steps involved in the formation of transport vesicles making sure to describe how components of the vesicle are selected, the role of monomeric GTPases, and how transport vesicle-target membrane fusion occurs.

Experimental Biology & Biostatistics Equation Sheet  

Using the information provided below, which elevational gradient has the most species?

Which type of vaccine can provide a strong immune response, but likely requires refrigeration?

Which of the following is NOT a characteristic of a stem cell that would be preferred for scientific study?

Clostridium perfringens and Staphylococcus aureus can both produce enterotoxins that can be harmful to humans if ingested after consuming contaminated food. These entertoxins may be harmful even if the microbes no longer survive. The ingestion of this contaminated food would lead to ______.

Using the image below, which letter represents the stage where cells are all replicating at a constant and exponential rate?  

The basal metabolic rate per unit of body mass is highest in a _____________________.

Which of the following tissue(s) types and characteristics are NOT correctly matched?

Cystic fibrosis shows autosomal recessive inheritance. Assuming complete penetrance, if two heterozygotes have two children, what is the probability that both children will be phenotypically normal?