Which structure of a protein is the folding of the protein chain? question 9 options: a. primary b. secondary c. tertiary d. quaternary

In addition to carbon ,carbonate minerals contain

What former head of the cuban secret service was charged with protecting the country's prime minister for nearly 50 years?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.