Examlex
Which of the following has a caloric value approximately equal to that of proteins?
Nitrogen
A chemical element with symbol N and atomic number 7, essential for all living organisms as a constituent of proteins.
Synergistic Interaction
A situation where two or more substances or actions combine to produce a total effect greater than the sum of their individual effects.
Isotopes
Variants of a particular chemical element that differ in neutron number, and consequently in nucleon number, but have the same number of protons in their atomic nuclei.
Neutrons
Subatomic particles located within the nucleus of an atom, having no electric charge and a mass slightly larger than that of protons.
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