what is the main difference between base pairing during DNA replication and base pairing during transcription

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Explanation:

Replication is a process involving the production of daughter copy by DNA. Transcription, on the other hand, is a process during which the coding strand of DNA is used as a template for the production of mRNA - messenger RNA.

During DNA replication, Adenine is paired with Thymine while Guanine is paired with Cytosine. During transcription, Adenine's pairing is replaced with Uracil while Guanine/Cytosine pairing remains the same.

hence, the main difference between the base-pairing during both processes is the replacement of Thymine with Uracil during transcription.

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.

69 is the correct math for the amino acids