Which term will replace the question mark (?) in the given series?
$$\text{Q1A, O4C, M9F, K16H, ?, G36M, E49P}$$

Let's break the alphanumeric series into three distinct parts:
1. First letter: $\text{Q}(17)\to \text{O}(15)\to \text{M}(13)\to \text{K}(11)\to \mathbf{I}(9)\to \text{G}(7)\to \text{E}(5)$ (Decreasing by $-2$)
2. Middle number: $1^2\to 2^2\to 3^2\to 4^2\to 5^2=25\to 6^2\to 7^2$ (Perfect squares)
3. Third letter: $\text{A}(1)\stackrel{+2}{\to }\text{C}(3)\stackrel{+3}{\to }\text{F}(6)\stackrel{+2}{\to }\text{H}(8)\stackrel{+3}{\to }\mathbf{K}(11)\stackrel{+2}{\to }\text{M}(13)\stackrel{+3}{\to }\text{P}(16)$ (Alternating gaps of $+2,+3$)

Combining these elements, the missing term is $\text{I25K}$.