Which of the following is an open circuit?
A. An open circuit is a closed loop for electrons
to follow.
B. An open circuit has an incomplete path for
electrons to follow.
C. An open circuit allows electrons to flow.
D. An open circuit is when a circuit is "on".

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis