Phospholipids Are Made by Integral ER Membrane Enzymes Whose Active

question 85

Multiple Choice

Phospholipids are made by integral ER membrane enzymes whose active sites face the cytosol and they are inserted into the outer (cytoplasmic) leaflet of the ER membrane.How then do lipids destined for the luminal leaflet of the ER membrane get there?

• A)They diffuse freely into the luminal leaflet.
• B)There are enzymes called flippases that flip these lipids later into the opposite leaflet.
• C)They are disassembled on the cytoplasmic side and reassembled on the luminal side.
• D)They move to the cytoplasmic leaflet by osmosis.
• E)There are enzymes called translocases that flip these lipids later into the opposite leaflet.

---

Definitions:

Temporal Lobe

A region of the brain involved in processing auditory information and encoding memory.

Recognizing Sounds

The cognitive ability to identify and differentiate between various sounds, an important aspect of auditory perception.

Dermatomes

Areas of skin that are mainly supplied by a single spinal nerve, which are clinically useful in determining levels of spinal cord injuries.

Peripheral Nervous System

The Peripheral Nervous System is the part of the nervous system consisting of the nerves and ganglia outside of the brain and spinal cord.