A cylindrical pulley with a mass of 6.2 kg, radius of 0.677 m and moment of inertia 12 M r2 is used to lower a bucket with a mass of 2.3 kg into a well. The bucket starts from rest and falls for 4.2 s. What is the linear acceleration […]

This problem poses the issue of the physiology of metabolism as related to long duration, endurance type of activity, like a marathon. Clearly the dietary requirements of a marathon runner would be different from a sprint athlete. These differences arise from the way the muscles work in a sprint event […]

You are working on corn and find that a particular locus you are studying influences the number of kernels in a row of corn, a quantitative trait. On average an ear of corn has ~800 kernels of corn in 16 rows. The locus you are working with appears to increase […]

The TP53 gene encodes the p53 protein. This 393-amino acid protein is a transcription factor that is regulated by phosphorylation and by its interaction with another phosphoprotein, the negative regulator Mdm2. In a normal cell, both proteins are unphosphorylated, which allows them to bind together. Mdm2 stimulates degradation of p53, […]