please answer all or explain.
11. Circle the statement that is not true for hemoglobin.
A.The R-state has a high affinity for diatomic oxygen.
B. 2,3-bisphosphoglycerate stabilizes the T-state.
C. Carbon monoxide stabilizes the R-state.
D. H+ ions stabilize the R-state.
12. Circle the statement that is not true forCO2.
A. It is a non-polar molecule that can diffuse across cellmembranes.
B. It can combine with terminal amines on proteins to formcarbamates.
C. It is primarily transported in the blood asHCO3.
D. It inhibits the release of O2 from hemoglobin.
13. What environmental pressure is considered responsible forkeeping the sickle cell gene in the human gene pool?
14. Circle the statement that is not true foran enzyme.
A. It reduces ΔG for a reaction.
B. It stabilizes the transition state in a reaction.
C. It increases the reaction rate in both the forward andreverse directions.
D. It has a catalytic site that is a crevice or cleft in themolecule.
15. What are the two types of cofactors that interact withenzyme? (8 points)
