You are a prestigious scientist working in a lab whose most recent project includes the creation of a series of drugs that will hopefully cure breast cancer. since this drug is in its early stages, you are not able to test it on humans. you test this drug on a cell culture and find that it destroys the mitochondria within the cell. which aspect of cellular metabolism would this drug interfere with?

Recently, I am studying medical biochemical products and believe that with biotechnology, we can have a much healthier body and a better quality life . This is the product I have been researching recently.

tissue microarray : Creative Bioarray provides custom tissue arrays to help scientists efficiently analyze gene and protein expressions in multiple tissue samples. Tissue microarray is a high-throughput technique that allows rapid gene expression and copy-number surveys of large numbers of different tissue specimens. In addition, it represents a technical revolution for highly effective use of human tissue specimens, which are both difficult and expensive to obtain in enough amount and case number.  

Based on the availability of more than 500,000 human and 30,000 animal samples in our tissue bank, we have constructed high quality tissue arrays to satisfy customers' special requirements.  

We have also established standard operation procedure in custom array service. Our tissue microarrays are produced by re-locating tissues from conventional histological blocks. Typically, 40 to 1,000 cylindrical formalin-fixed and paraffin-embedded tissue cores can be densely and precisely arrayed into a single paraffin block. From the block, up to 300 serial 4-8 μm thick sections can be produced and placed on individual glass microscopic slides.

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did you fail the test? xd

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!