A cell lysate contains a variety of proteins. Among the proteins in the lysate is protein A, which is composed primarily of a large number of glutamate and aspartate along with hydrophobic amino acids, and has a molecular mass of 75 kilodaltons. Another protein in the lysate is protein B, which is composed of a large number of lysines and histidines along with hydrophobic amino acids, and has a molecular mass of 50 kilodaltons, What would you say regarding this lysate?

Amolecule of one atom of carbon and two atoms of oxygen would be written oco? осо, o co2 o 200

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen