Foods Can Be Preserved in Many Ways by Slowing or Preventing

question 25

Multiple Choice

Foods can be preserved in many ways by slowing or preventing bacterial growth. Which of these methods should be least effective at inhibiting bacterial growth?

• A) Refrigeration: slows bacterial metabolism and growth.
• B) Closing previously opened containers: prevents more bacteria from entering, and excludes O₂.
• C) Pickling: creates a pH at which most bacterial enzymes cannot function.
• D) Canning in heavy sugar syrup: creates osmotic conditions that remove water from most bacterial cells.
• E) Irradiation: kills bacteria by mutating their DNA to such an extent that their DNA-repair enzymes are overwhelmed.

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Definitions:

Managed Float

An exchange rate system where the price of the currency is largely determined by the supply and demand in the foreign exchange market but where central banks attempt to influence the rate by actively buying and selling currencies.

Financial Crisis

A situation where the value of assets drops rapidly and the financial system becomes destabilized, often leading to recession.

Supply of Money

The total amount of money available in an economy at a particular time, including cash, coins, bank notes, and money held in bank accounts.

Currency Value

The worth of one currency expressed in terms of another currency, influencing international trade and economics.