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Chemical Principles VIII

All atoms with the same atomic number are classified as the same ______________________. CHEMICAL ELEMENT
When discussing synthesis, the combining substances are called ____________________ and the substance formed is the product. REACTANTS
Carbon has a valence of ______________________. FOUR
The principal energy-carrying molecule in all cells is ___________________. ADENOSINE TRIPHOSPHATE (ATP)
RNA differs from DNA in being usually ___________________ stranded. SINGLE
In a protein, the order of the amino acid sequence is the _________________________ level of organization. PRIMARY
Thymine and cytosine are single-ring structures called _______________. PYRIMIDINES
An example of a nitrogen-containing base in a nucleotide is __________________. (There can be more than one answer) ADENINE, GUANINE, CYTOSINE, THYMINE, URACIL
The ________________ level of protein organization provides it with a three-dimensional shape. TERTIARY
About _______________ different kinds of amino acids occur naturally in proteins. 20
Some important characteristics of water are its high ____________ and its capacity as a temperature _______________. BOILING POINT, BUFFER
Cations are positively charged ions; their outer electron shell is ________________ than half filled and they lose electrons. (less, more) LESS
The minimum collision energy required for a chemical reaction to occur is its ___________________. ACTIVATION ENERGY
Neutrons and protons have a weight about 1840 times that of ___________________. ELECTRONS
Decomposition yields energy, which is called an _________________ reaction. EXERGONIC
Created by: Micheleledet17