Misc: What is the name of Dr Whos time machine?

Questions

Study of the processes by which living cells use, store, & release energy?

Study of the substances found in living organisms, & of the chemical reactions underlying life processes?

Suzy Bogguss is 1 of 3 kids. Was she the oldest,middle,youngest?

Symbol si, semimetallic element that is the second most common element on earth, after oxygen?

Tanzania is the country that resulted from the union of Tanganyika & ______?