In Experiments Measuring the Rates at Which Different Monosaccharides Diffuse

question 148

Multiple Choice

In experiments measuring the rates at which different monosaccharides diffuse across phospholipid membranes, it was found that the rates followed this pattern (from slowest to fastest) : glucose < mannose < arabinose < xylose < ribose.What aspect of the current theories about the origin of life do these results support?

• A) It is thought that simple sugars were synthesized from simple molecule precursors in the primordial soup of early Earth.
• B) It is thought that nucleotides arose as the result of bond formation between sugar molecules, phosphate ions, and organic bases.
• C) It is thought that RNA was the first molecule to serve a catalytic function in the evolution of cells.
• D) It is thought that proteins became the primary catalytic molecules in modern cells because their ability to carry out catalytic functions is superior to that of RNA.
• E) It is thought that the evolution of living cells depended on the chemical evolution of certain biomolecules that serve as building blocks for biomacromolecules.

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Definitions:

Slave Sales

Transactions involving the buying and selling of individuals as property, a central element of the slave system in historical contexts.

Family Units

Social groups consisting of parents and their children, considered as a basic unit in society for educating children and providing emotional and financial support.

Compromise of 1850

A series of congressional laws intended to settle the issues arising from the expansion of slavery into new territories, aiming to ease tensions between the North and South.

Kansas-Nebraska Act

Legislation passed in 1854 that allowed the territories of Kansas and Nebraska to decide for themselves whether or not to allow slavery within their borders, leading to violent conflict.