Photosynthesis and Cellular Respiration SC 912 L 18

Photosynthesis and Cellular Respiration SC. 912. L. 18. 9

There about 40 calories in 10 grams of sugar, while the same amount of sand has 0 calories. How did the calories get into the sugar? A. Plants incorporate light energy into the sugar molecules they build during photosynthesis. B. When sugars inside a plant are exposed to light, the sugars absorb and hold energy. C. The heat of the Sun warms water inside a plant, which is used to heat the sugar molecules. D. Plants take energy from the nutrients they absorb through their roots and store it in sugar.

Which of the following are needed for photosynthesis to take place? A. carbon dioxide, oxygen, chloroplasts, light B. enzymes, sugar, carbon dioxide, water C. water, carbon dioxide, light, enzymes D. oxygen, water, sugar, light

If a plant loses most of its roots, which are used to absorb water and minerals from the soil, what effect would it have on the plant's ability to carry out photosynthesis? A. Photosynthesis would be unaffected because water isn't critical to photosynthesis. B. Photosynthesis would continue at the same rate, using water produced from cellular respiration. C. Photosynthesis would speed up in order to break down more glucose to replace the missing water. D. Photosynthesis would slow down, because there would not be as much water available.

Plants have both chloroplasts and mitochondria. Why do they need mitochondria if they have chloroplasts? A. The mitochondria get the stored energy back out of the sugars the chloroplasts built. B. The chloroplasts need the ATP that the mitochondria produce in order to operate. C. The mitochondria store light energy at night and the chloroplasts store it during the day. D. The chloroplasts require the carbon dioxide (CO 2) produced by the mitochondria to work.

How is aerobic cellular respiration similar to anaerobic cellular respiration? A. They both take place in the mitochondria. B. They both need oxygen in order to function. C. They both transfer energy stored in glucose to ATP. D. They both produce alcohol as a waste product.

If a person stops breathing, what major ingredient in the cellular respiration process will be missing, causing cellular respiration to halt? A. glucose B. carbon dioxide C. oxygen D. nitrogen

Which of the following best explains why a cell needs ATP? A. ATP can store energy for long periods of time, so the cell needs ATP and always has some. B. ATP provides the raw materials for making two of the nucleic acids in DNA. C. ATP functions as a hormone to send messages between organelles in the cell. D. ATP is used to provide small bursts of energy that are used to do work all over the cell.

Why do plants need to be able to perform cellular respiration if they can photosynthesize? A. Photosynthesis takes place in the daytime or when light is available, and respiration begins at night in plants. B. Photosynthesis puts energy into long-term storage, and respiration takes it out again when it is needed. C. Photosynthesis is used when there is no oxygen available, but plants switch to respiration when they have oxygen. D. Photosynthesis produces energy more efficiently for the plant, but respiration is used as a back-up energy source.

The diagram below shows the relationship between photosynthesis and cellular respiration and the organelles in which they occur. Which statement describes how photosynthesis and cellular respiration are interrelated?

Which statement describes how photosynthesis and cellular respiration are interrelated? A. Oxygen is produced during cellular respiration and stored during photosynthesis. B. Carbon dioxide and water released by cellular respiration are used in photosynthesis. C. Photosynthesis releases the energy that is stored during the process of cellular respiration. D. Glucose is used during cellular respiration to produce food that is broken down during photosynthesis.

What are the products of photosynthesis as well as reactants of cellular respiration? a. carbon dioxide and water b. carbon dioxide and oxygen c. glucose and carbon dioxide d. glucose and oxygen d. Glucose and oxygen

OUT OF 10 QUESTIONS • • • 1/10 = 10% 2/10 = 20% 3/10 = 30% 4/10 = 40% 5/10 = 50% • • • 6/10 = 60% 7/10 = 70% 8/10 = 80% 9/10 = 90% 10/10 = 100%