Bacteria Are Grown in a Medium Containing [¹⁵N]H₄Cl for a Number

question 60

Multiple Choice

Bacteria are grown in a medium containing [¹⁵N]H₄Cl 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 [¹⁴N]H₄Cl so that all subsequent new DNA will be 'light.' After one generation time, what does the DNA look like?

• A)All of the DNA is made of two 'light' strands.
• B)All of the DNA is made of two 'heavy' strands.
• C)All of the DNA is made of one 'heavy' strand and one '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)Half of the DNA is made of two 'light' strands and half is made of two 'heavy' strands.

Recognize the role of end-user development in system creation.

Comprehend the principles of Agile development and Rapid Application Development (RAD).

Identify key stakeholders in Agile project management.

Learn the advantages of various system development methodologies and tools, including JAD and prototyping.

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Definitions:

Compound Eye

An eye, such as that of an insect, consisting of many light-sensitive units called ommatidia.

Vertebrate Eye

The complex visual organ in vertebrates that allows vision and is typically adapted to the environmental light conditions of the organism.

Light Intensity

The measure of the wavelength-weighted power emitted by a light source, indicating the visual brightness perceived by the human eye.

Cyclic AMP

A second messenger important in many biological processes, including the regulation of glycogen, sugar, and lipid metabolism.