Hey im doing some practice and i would love if someone could help me fill this outt page 3 is what troubling me can anyone help

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

Which nucleotide component contains nitrogen

Resperation is a way to release carbon back into the atmosphere