This substance makes up the majority of your cells, and is necessary for them to carry out most of their chemical reactions. what is it?
a) carbon
b) oxygen
c) sugar
d) water

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

What amino acid is coded for by this sequence after the mutation

Which sets of mrna codons could genetically come for a protein with the following amino acid composition