Not really, unless you think you might want to specialize in areas that require this knowledge such as planetary geophysics, interstellar chemistry and such. Most of us take very traditional physics programs as undergraduates or graduate students. It is far more important to understand all of the mechanisms by which light is produced, and how you can interpret what you see. Geophysics would be very helpful if you were planning to specialize in the physics of the planets in our solar system, and little else. Chemistry may be far more useful, but the kinds of reactions and chemical networks that astronomers encounter are rather limited, especially by comparison to industrial chemistry. Organic chemistry, based on carbon, nitrogen and oxygen, is important because the more complex compounds we detect in interstellar clouds are small organic compounds involving carbon, nitrogen, hydrogen and oxygen atoms. If you want to specialize in the chemistry of interstellar clouds, planetary atmospheres and such, it is good to have had a formal exposure to chemistry. As for biology, unless you expect to find fossils on Mars, there is as yet no need for this information anywhere in astronomy.