If you don't know the author's name when citing you should... Only put the page number
Use the title of the text instead
Use your teacher's name
Don't cite it

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.

being surrounded by crimes, poverty, and failing schools as well as his own lack of confidence in his abilities.

the positive connotations of the words "pretty," "quiet," and "silence" give the excerpt a tone of nervousness. i think its this