Bio. help please help on theses 5 questions?

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1. Which of these molecules accept and transport hydrogen ions between the processes of cell metabolism?
ATP and ADP
NAD+, NADP+, and FAD+
Glucose and carbon dioxide
pyruvic acid and lactic acid


2. Which of these is the MOST important difference between aerobic respiration and anaerobic respiration?
Aerobic respiration produces more ATP for a cell.
Anaerobic respiration produces more ATP for a cell.
Glycolysis occurs only during anaerobic respiration.
Glycolysis occurs in mitochondria during aerobic respiration.


3. Which process is the source of the oxygen needed for aerobic respiration?
the dark reaction of photosynthesis
the Krebs cycle
the light reaction of photosynthesis
the electron transport chains of respiration


4. Which of these life processes is an example of anabolic metabolism?
chemical digestion
passive transport
protein synthesis
cell plasmolysis


5. Which statement BEST summarizes the importance of oxygen to life on Earth?
Oxygen makes multicellular life on Earth possible.
Oxygen makes plant life on Earth possible.
Without oxygen, all unicellular life on Earth would die.
Without oxygen, no life would exist on Earth.
 
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