The tumor suppressor gene LKB1 is expressed at lower levels in certain gastric cancers than in normal gastric tissue, with reduced levels of LKB1 transcription, decreasing LKB1 mRNA and protein levels. Based upon this information and your knowledge of gene expression, provide a potential explanation for how these cancer cells reduce expression of LKB1. a. True
b. False

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated