Help me correct my writing.

I was asked to write "career aspiration" for my scholarship application. I wrote it but it need corrections. please help me I have to submit it today! the paragraphs seems not to be connected. theres anything I could add to make it more impressive?

Thanks in advance

My ambition is to become leading research scientist in field of cancer biology. I have a strong passion in the field of oncology. This passion has been developed throughout my undergraduate days, during which I have taken several academic courses whose modules placed some emphasis in aspects related to cancer biology and genetics.
I have a passion to do my PhD in cancer biology but in xxxx only few centers have appropriate physical facilities and trained manpower in this field. That is why I want to pursue my higher studies from a prestigious institution from abroad in this field. While searching for suitable scholarship “xxxxx International Graduate Award” seems to be a perfect opportunity for me to pursue my PhD in my desired field. Based on my academic competency, I believe that I have the capability and potential to make positive contributions to the ongoing research projects at the Institute of Molecular and Cell Biology (IMCB). I hope to do my best if selected for the PhD program.
After completing my PhD from Singapore I would return to xxxx and teach at a research-oriented university and also practice different lab techniques, conduct research, and instill in students my enthusiasm for research and enable students to understand the subject in a better way. In long term I would carry out productive research in the field of Cancer biology to develop a better cure for cancer.