Why is the Mediator Complex only required for transcription in vivo, but is dispensable in vitro? What is different about the DNA template in vivo compared to the templates used in in vitro transcription systems?

the answer to your question is b

ok

explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

c should be the answer