[Answer] Which of these manufactures cellular membranes by adding membrane proteins and phospholipids to its own membrane?

Answer: As membrane proteins grow from ribosomes on rough ER the proteins are embedded into the rough ER membrane.
Which of these manufactures cellular membranes by adding membrane proteins and phospholipids to its own membrane?

The nuclear envelope is punctured by thousands of nuclear pores large hollow protein complexes about 100 nm across with an inner channel about 40 nm wide. They link the inner and outer nuclear membranes . Cell division. During the G2 phase of interphase the nuclear membrane increases its surface area and doubles its number of nuclear pore complexes.

It contains more than 151 different polypeptides and has a very high protein -to-phospholipid ratio (more than 3:1 by weight which is about 1 protein for 15 phospholipids ). The inner membrane is home to around 1/5 of the total protein in a mitochondrion. Additionally the inner membrane is rich in an unusual phospholipid cardiolipin.

Nuclear envelope – Wikipedia

Tue Jan 08 2002 13:30:00 GMT-0500 (Eastern Standard Time) ยท Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins . Being passive facilitated transport does not directly require chemical energy from ATP hydrolysis in the transport step itself …

The ribosome is a complex cellular machine. It is largely made up of specialized RNA known as ribosomal RNA (rRNA) as well as dozens of distinct proteins (the exact number varies slightly between species). The ribosomal proteins and rRNAs are arranged into two…

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