Exam 10: Photosynthesis

Use the following information to answer the questions below. A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. -If the power fails and the lights go dark, what will happen to CO₂ levels?

Why are C₄ plants able to photosynthesize with no apparent photorespiration?

Use the following figure and the compounds labelled A, B, C, D, and E to answer the following questions. -If the carbon atom of the incoming CO₂ molecule is labelled with a radioactive isotope of carbon, which organic molecules will be radioactively labelled after one cycle?

Photosynthesis is not responsible for

A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights, which are set to cycle between 12 hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks are monitored. Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask.

Which of the following statements is a correct distinction between autotrophs and heterotrophs?

CO₂ + H₂O → [CH₂O] + O₂ represents the simplified equation for

Which of the following statements best describes the relationship between photosynthesis and respiration?

If the process of photosynthesis had never evolved on Earth, this planet would