KE REVIEW~ MODULE 1

Carbohydrates, proteins, lipids, and nucleic acids.

Enzymes are protein molecules that act as biological catalysts.

Water as a solid has a lower density than as a liquid.

Facilitated diffusion.

Passive transport does not require energy, but active transport does.

Carbohydrates are biomolecules made of carbon, hydrogen, and oxygen, serving as a primary energy source.

Lipids are hydrophobic biomolecules that store energy and make up cell membranes.

Proteins are made of amino acids and perform various functions including catalyzing reactions and providing structure.

Nucleic acids, such as DNA and RNA, store and transmit genetic information.

Selective permeability means that cell membranes allow certain substances to pass while blocking others.