A occurs when a nitrogenous base is added or deleted during transcription. a. mRNA
b. point mutation
c. frameshift mutation
d transcript

How are gene and protein sequences used to classify organisms?

What is the number of phosphates in an atp molecule

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis