Which of the following amino acids have more than one asymmetric center?

check all that apply.
serine
isoleucine
proline
leucine
tryptophan
arginine
glutamate
threonine
lysine
tyrosine
glycine
alanine
asparagine
phenylalanine
histidine
valine
methionine
glutamine
cysteine
aspartate

Which substance has non polar covalent bonds

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.