After one year's work experience as a research technician at [redacted], one of the US's leading research institutes, I want to return to academic study and undertake graduate studies in Cell Biology and Molecular Genetics at the University of [redacted].
Stating what you are doing now and what you are applying for is a simple, direct way of starting an SOP.

After graduating with a first class degree from [redacted], University of [redacted], I felt I should gain some practical experience working in a research environment to gain first-hand knowledge of what the life of a research scientist entails. I have loved every minute of my work: especially the opportunity to participate in cutting-edge projects and discuss ideas with senior biologists. I soon realized that, although I enjoy handling the complex equipment and processing the results, I am not going to be satisfied with carrying out routine procedures under the direction of others. I want to be part of the team that directs the course of the project. My senior colleagues have encouraged my ambition and feel that I have the potential for graduate studies.
Notice how the student tries to analyze the reasons for her choices.

My love of biology started in high school. We had a young and enthusiastic teacher, Mrs [redacted], who took us on field trips and visits. She made sure we did as much practical work as was feasible, and demonstrated experiments that we hadn't the equipment or time to do ourselves. She also encouraged us to read. I remember the impact reading Maynard Smith's The Theory of Evolution had on me: I wanted to be able to explain such important ideas as clearly as he did. Quite naturally my first thoughts about a future career tended towards teaching � I wanted to be another Mrs [redacted].
It is good to explain how you became interested in your subject. However, don't go too far back! Notice that a specific example helps create interest.

At undergraduate level, my interests became more focused. Although physiology and ecology came easy to me, it was biochemistry and cell biology that really captured my interest. We were fortunate to have good laboratories and excellent professors. I found that cell biology was an interdisciplinary undertaking: today you need a foundation in chemistry, physics and even IT to be at the forefront in this subject. This interdisciplinary aspect of the subject suits my abilities well. I have always performed well in all science subjects and find it challenging to apply the knowledge to practical problems. For this reason I chose to undertake a project in my final year on the behavior of protein molecules in high energy fields at [redacted]. The scientists at [redacted] were impressed with my practical skills and were happy to give me a recommendation that led to my present job.
Details of courses and projects help to show focus. (This student went on to describe another important college project. She also gave a full description of her current scientific work.)

Many people have asked me why I did not proceed directly to graduate studies after graduating. The