Question | Answer |
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 |