Sperm whales have a specialized spermaceti organ in their head cavities filled with wax cetyl palmitate  (C15H31COOC16H33). Explain what is the purpose of this organ in sperm whales.

MYK-461 is also hypothesized to a) stabilize a head-head interaction in two-headed cardiac myosin. b) inhibit skeletal muscle myosin shortening. c) prevent myosin binding protein C from regulating actin-activation of cardiac myosin. d) accelerate ADP release, but only in the absence of actin. e) disrupt the OFF state of the thick-filament. Don't copy from Google

How does hemoglobin bind O2 cooperatively? A. The binding of one molecule of O2 to one subunit of hemoglobin enhances the assembly of other subunits to form a complete hemoglobin protein. B. The binding of one molecule of O2 to one hemoglobin protein enhances the binding of a molecule of O2 to a different hemoglobin protein. C. The binding of one molecule of O2 to one subunit of hemoglobin enhances the affinity of the same subunit for more molecules of O2. D. The binding of one molecule of O2 to one subunit of hemoglobin enhances the affinity of other subunits for O2.

You are attempting to crystallize the head group of a myosin-like muscle protein from a newly discovered vertebrate organism. Assuming that the protein structure is similar to other vertebrate myosins, which enzymes should you use to remove the myosin-like head group from the rest of the myosin-like protein?       A)  both trypsin and myosinase   B)  both trypsin and papain   C)  papain   D)  trypsin   E)  myosinase

In a floodplain or swampy environment would individuals with a mutation of a decreased ability to withstand temperature changes to an overall decrease in fatty tissue would be or less well adapted to their environment? why?

centriole funtion in plants and animals

Given the effect of myosin heavy chain phosphorylation on myosin II assembly/disassembly, why might it make sense to find this kinase near the contractile ring as the process of cell division is concluding?

How do the regulatory proteins work to regulate contraction? Simplify the answer.

Early detection and adherence to a strict dietary regimen have prevented much of the intellectual disability that used to occur in those with phenylketonuria (PKU). Affected individuals now often lead normal lives and have families. For various reasons, such individuals tend to adhere less rigorously to their diet as they get older. Predict the effect that mothers with PKU who neglect their diets might have on newborns.

1 2 3 4 description Cell membranes in both plants and animals are primarily made of this kind of molecule. This kind of molecule is usually a short-lived messenger molecule that conveys information about pain and inflammation. When circulating nutrients are insufficient to meet the body's energy needs, this type of molecule is broken down into smaller molecules that can be oxidized in cells to supply energy. This molecule is the starting point for the synthesis of many hormones, including the sex hormones testosterone and estradiol. Which molecules fit this description? 0 0 U 0 none of them 0 none of them Onone of them none of them