When required a single Humira pre-filled pen may be stored at room temperature (below 25Â°C) for a maximum period of 14 days, but must be protected from light. Once removed from the refrigerator and stored at room temperature, the pen must be used within 14 days or discarded, even if it is returned to the refrigerator.
1 Cholesterol molecules are selectively dispersed between membrane phospholipids. 2  This helps to keep cell membranes from becoming stiff by preventing phospholipids from being too closely packed together. 3  Cholesterol is not found in the membranes of plant cells.
Which is an organelle found in the cytoplasm has a smooth outer membrane and greatly folded inner membrane? Mitochondria in animal cells. Both mitochondria and chloroplasts in plant cells.