DNA Double Helices Are Soluble in Water but Insoluble in Alcohol

question 42

Multiple Choice

DNA double helices are soluble in water but insoluble in alcohol. How do these physical properties reflect the chemical structure of the DNA molecule?

• A) The charged phosphate groups and sugars of DNA are hydrophilic.
• B) The purine and pyrimidine bases are hydrophilic.
• C) The 5 prime to 3 prime polarity of DNA makes it soluble in water but not in alcohol.
• D) The charged R-groups of DNA are hydrophilic.

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Definitions:

AVC (Average Variable Cost)

The total variable cost divided by the number of units produced, indicating the variable cost per unit.

MC (Marginal Cost)

The cost incurred by producing one more unit of a product or service.

Shutdown Point

The level of production and price at which the revenue received does not cover the variable costs, making further production unprofitable.

ATC (Average Total Cost)

The total cost of production divided by the quantity produced, representing the cost per unit of output.