Can I update to Mountain Lion on my 2007 imac?

Question

I currently have Snow Leopard 10.6.8.  I got my imac in December 2007 from an Apple Store, but I can't seem to find anything that specifically says it is 'an early 2007' or 'late 2007' model. How do I know this? I have read that the 2007 model must be a late model. I also  have 4 GB of memory, and it is an Intel core 2 duo. What I fit other qualifications after the answer to the 2007 model question is answered?
Also, can I go straight from Snow Leopard to Mountain Lion?

Answer 1

Lion System Requirements
Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
At least 2GB of memory
OS X v10.6.6 or later (v10.6.8 recommended)
7GB of available space on hard drive
Some features require an Apple ID; terms apply.
Open System Profiler in Utilities folder. Note the Model Identifier in the display on the right.
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Macs that will support OS X 10.8 Mountain Lion
As usual, the newer the Mac the better:
MacBook Pro – 13″ from mid 2009 or later, 15″ from late 2007 and newer, 17″ from late 2007 and newer
MacBook Air – late 2008 and newer
iMac – models from mid 2007 and newer
MacBook – 13″ aluminum from 2008, 13″ from 2009 and newer
Mac Mini – early 2009 and newer
Mac Pro – early 2008 models and newer
XServe – early 2009 models and newer
Macs that are NOT expected to support OS X Mountain Lion
Older Macs and those with weaker GPU’s will likely be left behind:
Anything with an Intel GMA 950 or x3100 integrated graphics card
Anything with an ATI Radeon X1600
MacBook models released prior to 2008
Mac Mini released prior to 2007
iMac models released prior to 2007
Original MacBook Air
Your model must have a 64-bit EFI boot ROM. See OS X v10.6- Macs that use the 64-bit kernel
An easy way to tell if you are running a K64 kernel is to use the uname command-line program. The "x86_64" in the excerpt below means that we are running a 64-bit kernel. If the output showed "i386" instead, that would mean a 32-bit kernel.
$ uname -a Darwin... root:xnu-1456.1.25~1/RELEASE_X86_64 x86_64
If your computer does not boot into the 64-bit kernel automatically you can force it to by restarting and holding down the "6" and "4" keys after the chime. Re-run the above command in Terminal. If you don't see "x86_64" then your model does not have a 64-bit EFI boot ROM and cannot boot Mountain Lion.