I need help finding the next answer to the question

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.

The structure of a dna molecule is best described as a. one long strand of nucleic acids b. two strands of dna nucleotides joined by hydrogen bonds c. two strands of amino acids joined by hydrogen bonds d. one long strand of amino acids