The calcium ions involved in skeletal muscle contraction bind to a(n) ________ subunit.

Look at the image below. This represents the _______________________ structure of protein. 

A peptide bond 

If the ▲Go is a positive number, the reaction is defined as _________ and free energy is ________.

Cellulose belongs to which of the following groups of macromolecules ___________? It composes the cell wall in ______________.

RNA molecules that catalyze biochemical reactions are known as what?

Key differences between prokaryotic and eukaryotic ribosomes: Eukaryotic ribosomes and their subunits are larger (80S) and contain more proteins and larger ribosomal RNAs (rRNAs) than those of bacteria which are smaller (70S). 

Heat, light, electrical, chemical, nuclear, sound are all examples of energy. 

Chemical energy, for example the energy in a mole of ATP, is an example of_____________ energy

Energy entering/leaving the system in units of heat energy is termed