A NASA Probe Returned Samples of Rocks from the Surface

question 36

Multiple Choice

A NASA probe returned samples of rocks from the surface of Mars.From these rocks,a prokaryotic organism was isolated and remained viable under conditions similar to those of Mars.The organisms are capable of dividing to replicate themselves.In order to determine whether the DNA replication of these organisms was semiconservative,an experiment using N15/N14 (similar to that of Meselson and Stahl) was performed.If the method of DNA replication were conservative,after one generation one would expect to see

• A)all of the DNA in the heavy (N¹⁵)band.
• B)all of the DNA in the light (N¹⁴)band.
• C)all of the DNA at a point midway between the heavy and light bands.
• D)half of the DNA in the light band,the other half in the heavy band.
• E)None of these are correct.

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Definitions:

Cost Minimisation

A business strategy aimed at reducing expenses to improve profitability without compromising on the quality of the products or services offered.

Predetermined Manufacturing Overhead Rates

Rates used to allocate manufacturing overhead costs to products, calculated before the actual costs or activity levels are known.

Direct Labour Hours

Direct labour hours refer to the amount of time spent by workers directly involved in the manufacturing process of a product or service.

Cost Driver

A factor that causes or relates to a change in the cost of an activity or product.