Which compound(s) is/are not an electron carrier(s) involved in the respiratory chain? A. Iron-sulfur proteins B. Cytochromes C. Coenzyme A D. NADH Ubiquinone

Which organelle breaks down sugar molecules that supply energy to the cell ?

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

The earth's oceans are made up of chlorine, and trace elements. a) carbon, oxygen b) oxygen, silicon c) hydrogen, oxygen d) nitrogen, oxygen