The Surfaces of the Two Ribosomal Subunits That Face One

question 22

Multiple Choice

The surfaces of the two ribosomal subunits that face one another contain the binding sites for the mRNA and incoming tRNAs and are thus of key importance for the function of the ribosomes.The fact that these surfaces consist largely of RNA supports what proposal?

• A)the proposal that primordial ribosomes were composed solely of proteins
• B)the proposal that primordial ribosomes were composed exclusively of RNA
• C)the proposal that primordial ribosomes were composed exclusively of DNA
• D)the proposal that prokaryotes gave rise to eukaryotes
• E)the proposal that endosymbiosis gave rise to eukaryotes

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Definitions:

Common Size Analysis

A financial analysis technique that expresses each line item on a financial statement as a percentage of a base figure to allow for comparison.

Financial Statement

A written record detailing the financial activities and condition of a business, including balance sheet, income statement, and cash flow statement.

Base Amount

A reference value or level in financial calculations, often serving as a benchmark for comparing financial performance or changes.

Horizontal Analysis

A technique for evaluating a series of financial statement data over a period of time, to determine the increase (decrease) that has taken place, expressed as either an amount or a percentage.