How Do Eukaryotic Ribosomes Prevent False Starts at Inappropriate Parts

question 19

Multiple Choice

How do eukaryotic ribosomes prevent false starts at inappropriate parts of the mRNA?

• A) There is a consensus sequence, called the Kozak sequence, surrounding the start codon in eukaryotes.
• B) The Shine-Dalgarno sequence positions the ribosome properly, just as in prokaryotes.
• C) Only one start codon ever appears in eukaryotic mRNA, so false starts are not a problem.
• D) Nothing; false starts are quite common in eukaryotic translation.

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Definitions:

Target Profit

The desired level of profit that a business plans to achieve within a specific period.

Contribution Format

A format for income statements where all variable expenses are subtracted from sales to calculate contribution margin, which then has fixed expenses subtracted to determine net operating income.

Income Statement

A financial report that shows a company's financial performance over a specific period, including revenues, expenses, and profit or loss.

Contribution Margin Ratio

The percentage of sales revenue that exceeds variable costs, indicating how much of each sales dollar is available to cover fixed costs and generate profit.