Bio 111: Photosynthesis and Cellular Respiration Name: 8 9 1 7 4 Down: 1. primary light absorbing pigment in autotrophs 2. most common carbohydrate molecule produced by photosynthesis. 3. the second of two major stages in photosynthesis, involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate. 4. cellular respiration that takes place where there is NO oxygen. 6. the small openings on the undersides of most leaves through which oxygen and carbon dioxide can move Across: 3. this flow of hydrogen ions generates 90% of the ATP made during aerobic glucose catabolism 5. the first step of cellular respiration where glucose is broken in half and 2 ATP energy units are released. 7. an organism that must eat plants or other animals for food. 8. an organelle inside a plant cell where photosynthesis takes place 9. an organelle inside both animal and plant cells where cellular respiration takes place.

5. A certain radioactive material follows the law of exponential change and has a half-life of 38 hours. Find how long it takes for 90% of the radioactivity to be dissipated.

(4) [Text-problem 4.29] A 90-m³ basement in a residence is found to be contaminated with radon coming from the ground through the floor drains. The concentration of radon in the room is 1.5 Bq L- (becquerels per liter) under steady-state conditions. The room behaves as a CMFR, and the decay of radon is a first-order reaction with a decay rate con- stant of 2.09 × 10-6 s-1. If the source of radon is closed off and the room is vented with radon-free air at a rate of 0.14 m³ s-1, how long will it take to lower the radon concentration to an acceptable level of 0.15 Bq L-¹?