Membrane Receptors
Membrane receptors bind to external molecules called ligands and cause an internal cellular response. Membrane…
AAMC Outline
Membrane potential
A cell’s membrane potential is negatively charged when it is resting and non-signalling and is…
Membrane channels
Channel proteins span the membrane and make hydrophilic tunnels across it, allowing their target molecules to…
Solute transport across membranes
Solutes can be transported across the plasma membrane through a variety of methods, diffusion, osmosis,…
Membrane dynamics
The membrane is a dynamic structure which is always moving, this is because the phospholipids…
Mitotic process: prophase, metaphase, anaphase, telophase, interphase
Mitosis steps consist of prophase, metaphase, anaphase, and telophase; the cell undergoes nucleus division and…
Composition of membranes
The plasma membrane separates the interior of a cell from its outside environment and is…
Missense, nonsense codons
Mutations in a DNA sequence can produce errors during protein synthesis by leading to missense…
Mechanism of transcription
Transcription is the first step in gene expression, and is the process by which a…
Active Site Model
The active site model describes the part of an enzyme to which substrates bind and…