Which structure of a protein is the arrangement of polypeptides?

a- primary
b- secondary
c- tertiary
d- quaternary

What is the process of pulling apart an n2 molecule nevermind i got it

How does the carbon cycle involve an exchange of carbon

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.