Which of the following is NOT made of proteins?
A. Muscle
B. Polypeptide chains
C. Hydrogen
D. Ligaments
PLS HELP FOR BRAINLIEST

In fruit flies, gray bodies (g) are dominant over black bodies (g), and brown pigments (n) are dominant over yellow pigments (n). each individual possesses two alleles for each trait. if a fly that is homozygous dominant for both traits is crossed with a fly that is homozygous recessive for both traits, what is the predicted genotype of the offspring.

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?