Scientists Found That Polypeptides That Are Normally Synthesized in the Endoplasmic

question 24

Multiple Choice

Scientists found that polypeptides that are normally synthesized in the endoplasmic reticulum are about 20 amino acids longer when they are synthesized by ribosomes not attached to the endoplasmic reticulum.What is/are possible explanations for the greater length of these polypeptides?

• A)The ribosomes that function as free ribosomes function differently than the ribosomes that are attached to the endoplasmic reticulum.
• B)The 20 amino acids serve as a signal sequence that directs the forming polypeptide to the endoplasmic reticulum,where they are cleaved off during processing.
• C)The 20-amino-acid sequence helps the endoplasmic reticulum package these proteins for shipping to the Golgi.
• D)The protein has a different function in the cytosol than in the endoplasmic reticulum.

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Definitions:

Output

The total amount of goods and services produced by an economic system.

Most Efficiently

Operating in a way that maximizes productivity or benefits while minimizing waste and costs.

Output

The total amount of goods and services produced by an economy, business, or machine in a given period.

MC Equals MR

A condition in economics where the marginal cost of producing an additional unit is equal to the marginal revenue received from selling that unit, often used to determine the optimal level of production in perfectly competitive markets.