Nitrogen is generally available to plants in only two forms: ammonium and ________
Fill in the blank(s) with correct word
nitrate
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During every energy transformation, it can be said that ____
a. the entropy of the universe increases b. the entropy of the universe decreases c. there is an increase in the free energy of the universe d. there is a change in the total energy of the universe e. the system becomes more organized
A protein channel linking the cytoplasms of adjacent animals cells is called a(n)_ junction.
A. anchoring B. gap C. tight D. adhering E. microtubular
A ribozyme catalyzes a reaction on itself and actually changes shape. This is an example of what?
A. intramolecular catalysis B. intermolecular catalysis C. interenzyme reactions
During protein synthesis in eukaryotes, which molecule passes from the nucleus to the cytoplasm and specifies the sequence of amino acids in the new polypeptide?
A. DNA B. RNA polymerase C. mRNA D. rRNA E. tRNA