The phosphorylation of fructose

Phosphofructokinase-1 (PFK-1) is a large enzyme that catalyzes the phosphorylation of fructose 6-phosphate during glycolysis. In fungi, the PFK-1 enzyme is composed of four alpha subunits and four beta subunits. How would you describe the quaternary structure of PFK-1? (2pts) A. aß heterodimer B. aaßs heterotetramer C. a4ßs homotetramer D. α4B4 homooctamer E. a4ßa heterooctamer (6) Imagine a protein exists as an a3bs heterohexamer and weighs 120 kDa. Which description best matches this protein? (3pts) A. six subunits that weigh 20 kDa each B. six subunits; (3) weigh 10 kDa each and (3) weigh 30 kDa each C. three subunits that weigh 40 kDa each D. three subunits; (2) weigh 50 kDa each and (1) weighs 20 kDa