Could someone please help me out?? Which of the following is not true about proteins?
A.) Proteins are found in hemoglobin and in the keration of skin.
B.) Proteins are made up of long chain amino acids
C.) Polypeptides are formed by 10 or mode amino acids
D.) Common amino acids are adenine and guanine

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

What is the percent by mass of magnesium sulfate in mgso4.7h2o