Use the following table to answer the question: Codons Found in Messenger RNA

This table shows the codons found in messenger RNA. Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Val-His-Thr?

3' GUA-CAU-ACC 5'

3' GTA-CAT-ACC 5'

3' CAT-GTA-TGG 5'

3'CAU-GUA-UGG 5'

3' GTA-CAT-ACC 5'

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.