Which of the Following Cycles Is Thought to Be Most

question 62

Multiple Choice

Which of the following cycles is thought to be most under biological control?

• A)oxygen
• B)phosphorus
• C)sulfur
• D)lead

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Definitions:

Alkynyl Carbon

A carbon atom triple-bonded to another carbon atom, found in alkynes, a type of hydrocarbon with general formula CnH2n-2.

Chemical Shift

In nuclear magnetic resonance (NMR) spectroscopy, a measure of the difference in resonant frequency of a nuclear spin relative to a standard.

Sensitivity

The degree to which a system or a measurement responds to a change in a given variable, commonly used in contexts ranging from scientific instruments to personal perception.

Proton Spin Decoupled

A technique in NMR spectroscopy where the interaction between proton spins is removed to simplify the spectrum.