How Are Integral Membrane Proteins Thought to Enter the Lipid

question 94

Multiple Choice

How are integral membrane proteins thought to enter the lipid bilayer?

• A)They insert into the membrane from the RER lumen after their synthesis is complete.
• B)The aqueous translocon channel seems to have a gate that continuously opens and closes,giving each nascent polypeptide segment a chance to partition itself into the lipid bilayer's hydrophobic core.
• C)They insert into the membrane from the cytosol after their synthesis is complete.
• D)It is thought that they burrow into the lipid bilayer.
• E)It is thought that they are enzymatically implanted in the lipid bilayer.

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Definitions:

Controlling Account

The account in the general ledger that summarizes or controls a subsidiary ledger. Example: The Accounts Payable account in the general ledger is the controlling account for the accounts payable subsidiary ledger. After postings are complete, it shows the total amount owed from purchases made on account.

General Ledger

A comprehensive record of all financial transactions made over the life of a company.

Vouchers Payable

Liabilities representing invoices that have been received but not yet paid.

Separation Of Duties

Separation of duties is a key control in internal systems, aimed at reducing the risk of fraud and errors by ensuring that no single individual has control over all aspects of a financial transaction.