In drosophila, an autosomal recessive mutation sepia (se) (on chromosome 3) causes sepia eye door, and another recessive mutation scarlet (st), also on chromosome 3, causes scarlet eye color. distance between the two genes is 18 map units apart. flies which are recessive homozygous by both of these mutations have […]

when chicken egg whites( which are chiefly composed of proteins) are heated they harden although we cannot reverse this process, we can dissolve the hardened egg white if we heat it in a solution containing a strong detergent ( eg sodium dodecly sulfate) and a reducing agent such as B- […]

When activated by the extracellular signal protein platelet-derived growth factor (PDGF), the PDGF receptor phosphorylates itself on multiple tyrosines (as indicated in Figure 16-46A by the circled Ps; the numbers next to these Ps indicate the amino acid number of the tyrosine). These phosphorylated tyrosines serve as docking sites for […]

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 […]