sparty, you really excited me myaan, i'm a molecular biology major too, last year in school. 90K without post doc and 125k with post doc is really enticing. looks like i'll have a good future, ! 

jaibik shakti, 3.6 is a really good GPA for PhD. Now you need a good GRE score. You don't have to do really really good, just meet the expectations of the grad schools you are applying. They don't really care about your GRE score as long as you have the score they want. And GRE is not that tough to master. You'll nail it with ease if you study well for 3-4 months.
Get your name in a paper or two if you can. Grad schools look for your research experience more than anything else. They want to see that you are passionate about science and research. If you have that and can demonstrate that in your essays and interviews, you'll get in easily. 

I'm not sure which schools are good for biochem, but think wide. When you apply, apply to as many schools as you can (since application is not expensive as for Med schools). Choose 3-5 really good schools. By that, I don't mean choose Harvard, Yale, and Stanford, but it doesn't harm to apply. Who knows, you might get in! And pick 5-6 mediocre schools  that you think you have pretty good chance of getting in, and 4-5 schools that will lick your soles to have you in their program. That way, you can be sure that you'll have at least one school that'll take you in its lap. 

doing research in animal subjects in Nepal is very tough because there's no resource. i've no idea if they even do any research of that kind. but you can count India as your refuge in case you don't have anything to do in Nepal besides teaching those punk college kids. Or, just stay in the states for a few years after you're done with PhD, build network in Nepal (with GO and well as NGOs), get some money and then go back to Nepal and establish your kind of work. 

But, as others have said, if you don't like research so much and want to do PhD just because you think you'll be able to bump your yearly income after that, that's probably not a good way to follow. PhD is more about research than money, but money comes alongwith it once you start being a good research scientist. Don't get entangled on all those figures, how much you're earning now, how much time you'll spend while doing PhD, how much you'll earn after you're a PhD, and so forth. It's all about what you really want to do and what you want to be. Good luck with your career. 

(And to tensed guy and all other guys who are tensed like him, keep on counting the figures people, that's all you can do. If you think life sciences has no money, you better stop complaining and go do something else because it's not science that pays you less, it's you who chose science. And finally, let me tell you a simple fact - for every 1 dollar of grant spent in biomedical research, the society gets 17.xx dollars and that's what all IT, BBA, MBA, CA, Executives, etc are counting.)

- Jantare1/DrKanchho