In 1869, Russian chemist Dimitri Mendeleev proposed arranging the known elements by atomic weights and properties in 17 columns with two partial periods of seven elements each followed by two nearly complete periods. Rayleigh and Ramsey
improved the periodic table by discovering the inert gases. In 1911, Henry Moseley subjected elements to x-rays and was able
to derive the relationship between x-ray frequency and number of protons. When Moseley arranged the elements according to
increasing atomic numbers and not atomic masses, some inconsistencies associated with Mendeleev's table were eliminated.
The modern periodic table is based on Moseley's Periodic Law.
Changes in the periodic table from 1800's to the present are based on all BUT ONE of these factors.
A)
peer review
B)
empirical data
C)
fact verification
D)
journal publication

Match the descriptions / definitions with the term they best describe 1. three dimensional relationship of the different polypeptide chains in a multisubunit protein or protein complex 2. common folding pattern in proteins in which a linear sequence of amino acids folds into a right-handed coil stabilized by internal hydrogen-bonding between polypeptide backbone atoms. 3. the amino acid sequence of a protein 4. a region on the surface of a protein that can interact with another molecule through noncovalent bonding. 5. three-dimensional arrangement of alpha-helices and beta-sheets within a single polypeptide, typically stabilized by a variety of noncovalent bonds, including ionic and hydrogen bonds, and nonpolar interactions / hydrophobic force. 6. the chain of repeating carbon and nitrogen atoms, linked by peptide bonds, in a protein. 7. common structural motif in proteins in which different sections of the polypeptide chain run alongside each other and are joined together by hydrogen bonding between atoms of the polypeptide backbone. 8. portion of a polypeptide chain that has a discrete tertiary structure of its own and can often fold independently of the rest of the chain 9. regular local folding patterns in a protein, including alpha-helix and beta-sheet a. primary structure b. beta-sheet c. protein d. coiled-coil e. polypeptide backbone f. secondary structure g. side chain h. tertiary structure i. binding site j. alpha-helix k. quaternary structure l. protein domain

Each hereditary trait corresponds to

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)