What particle always has a mass of one atomic mass unit (amu) and no charge?

1)a neutron

2)a proton

3)an electron

4)an atom

What is the sequence of amino acids corresponds with the rna strand ucg ggg cac

Approximately what wavelength of light is best absorbed by chlorophyll a

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.