CO2 and 2,3-BPG effect the ability of hemoglobin to bind oxygen. Which statement is true?

a. Stripped Hb cannot bind CO2 or 2,3-BPG.
b. If stripped Hb is treated with 2,3-BPG and CO2, the O2-binding curve for Hb will mirror that of fully intact Hb.
c. If stripped Hb is treated with 2,3-BPG, the O2-binding curve for Hb will shift left.
d. If stripped Hb is treated with CO2, the O2-binding curve for Hb will match the binding curve for Hb with 2,3-BPG

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the answers would be

the first one and the second one

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.