Refer to the Figure Below

question 1

Multiple Choice

Refer to the figure below.Part A shows the structure of one of the RNA molecules in a ribosome.Part B shows how the progress of protein synthesis is affected when one of the hydroxyl groups in an adenine nucleotide (adenine 2451 in part A) in this RNA molecule is chemically altered. A ribosome functions as the site of protein synthesis in modern cells.Structurally, a ribosome is composed of several protein and RNA molecules that combine in a complex.Based on the information shown, which statement accurately provides evidence for the "RNA world" hypothesis of the origin of life on Earth?

• A) Modern ribosomes are large multimolecular complexes.
• B) Protein synthesis in modern ribosomes is catalyzed by an RNA molecule, not by a protein.
• C) Some chemical modifications of a ribosomal RNA molecule do not change its biological activity.
• D) Ribosomal RNA uses intrachain base pairing to stabilize its three-dimensional structure.
• E) Ribosomal RNA is single-stranded.

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Definitions:

Externality Problems

Issues arising from the impact of one person's actions on the well-being of a bystander, which are not reflected in market prices.

Marginal Benefit

The extra pleasure or advantage obtained from acquiring or generating an additional unit of a product or service.

Tax Cost

The economic expense associated with the imposition of taxes, including the burden on consumers or producers.

Resources Allocation

It involves distributing available resources among various competing needs or projects in order to achieve desired objectives or optimize outcomes.