Preheat oven to 180 celsius. Greased the loaf pan and set aside.
In a mixing bowl, sift flour. Add sugar, baking powder, baking soda, salt and mix well.
In a separate bowl combine lemon juice, lemon zest, oil, yogurt and turmeric powder. Add wet ingredients into dry and mix until smooth. Slowly pour batter into a greased loaf pan. Bake for 55 minutes or until a butter knife through the center and comes out clean.
Let the cake cool for about 10 minutes in the pan, then turn the cake out onto a plate.