Why are enzymes so important?
because they act as a catalyst in the chemical reactions necessary for life within organisms.
because they cause decomposition reactions.
because they are the building blocks of proteins.
because they are the building blocks of dna and rna.

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

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

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.