What explains the observation that a single eukaryotic protein coding gene can give rise to multiple different proteins, i.e., why are there only ~25,000 human genes in the genome, but ~150,000 different proteins in the human "proteome? " choose the two best correct answers?

• Genes can contain more than one polyadenylation site, which alters the 3' of the mRNA transcript and the inclusion/exclusion of exons.
• mRNA transcripts from the same gene can be differentially spliced to include/exclude exons.

The DIRECT PHOSPORYLATION OF ADP BY CREATINE PHOSPHATE is the most inefficient pathway to regenerate atp during 30 minutes of light to moderate exercise.

Aerobic respiration is the pathway for regenerating atp that provides the majority of the energy used for muscle activities during 30 minutes of light to moderate exercises.