The energy released in the mitochondrial electron transport chain is used to transport protons where?
A. into the nucleus
B. into the cytoplasm
C. into the mitochondrial matrix
D. into the intermembrane space of the mitochondria
E. into the endoplasmic reticulum
Answer: D
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After acetyl-CoA synthesis, the chemical energy of how many carbons of the original glucose molecule will be converted to chemical energy in the form of ATP in the remaining steps of aerobic respiration?
A. 1 B. 2 C. 3 D. 4 E. 5
What components of membranes are the most abundant?
a. carbohydrates b. sterols c. proteins d. fats e. phospholipids
A circulatory system that allows some mixing of oxygenated and oxygen-poor blood is indicated by the letter(s) ____
a. A only b. B only c. C only d. A and B only e. B and C only
Birds are most closely related to:
a. reptiles. b. testudines. c. mammals. d. labyrinthodonts. e. terrapins.