Final answer:
The top of the tube for serum testing for HDL should be blue-green in color. This is because a positive reaction in the test will have moderate-to-large sized dark clumps against a blue-green back-ground, distributed uniformly over the surface of the test circle.
Step-by-step explanation:
The top of the tube for serum testing for HDL should be blue-green in color.
This is because a positive reaction in the test will have moderate-to-large sized dark clumps against a blue-green back-ground, distributed uniformly over the surface of the test circle.