In Prokaryotes, the Genes for Metabolic Pathways Are ____

question 59

Multiple Choice

In prokaryotes, the genes for metabolic pathways are ____. ​

• A)always expressed for early steps in the pathway, but generally not expressed for later steps in the pathway
• B)always expressed so the bacteria can respond to rapidly to changing conditions
• C)turned on and off as conditions change
• D)always independently regulated
• E)generally expressed at low levels, but expressed at high levels when conditions warrant

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Definitions:

Pigment

Substances that impart color to materials or organisms; in biological contexts, they absorb certain wavelengths of light and reflect others, visible to the human eye as color.

Chlorophyll

A green pigment found in the chloroplasts of plants, algae, and some bacteria, essential for photosynthesis.

Wavelength

Distance between the crests of two successive waves.

Photolysis

Process by which light energy breaks down a molecule.