Bacteria Are Grown in a Medium Containing ¹⁵NH₄Cl for a Number

question 44

Multiple Choice

Bacteria are grown in a medium containing ¹⁵NH₄Cl for a number of generations so that all of the DNA is made of fully "heavy" DNA.The bacteria are moved to a new medium and grown in ¹⁵NH₄Cl so that all new DNA will be "light".If replication were conservative,what would the DNA look like after two generation times.

• A)All of the DNA is made of 2 "light" strands.
• B)Half of the DNA is made of 2 "light" strands and half of the DNA is made of 1 "light" strand and 1 "heavy" strand.
• C)All of the DNA is made of 1 "heavy" strand and 1 "light" strand.
• D)Each strand is made of a mixture of "heavy" and "light" DNA with each strand being between 75% and 100% "light".
• E)75% of the DNA is made of 2 "light" strands and 25% of the DNA is made of 2 "heavy" strands.

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Systematic Risk

The type of risk inherent to the entire market or market segment, which cannot be mitigated or eliminated through diversification.

Cost of Equity

The return a company theoretically pays to its equity investors to compensate them for the risk they undertake by investing in the company's stock.

Required Rate of Return

The minimum annual percentage earned by an investment that will entice individuals or companies to put money into a particular project or investment.

Negative NPV

A situation where the present value of future cash flows of an investment is less than the initial investment cost, indicating a potential loss.