Which process in photosynthesis uses energy from the sun?(1 point)
Responses
releasing oxygen
releasing oxygen
combining carbon dioxide and hydrogen
combining carbon dioxide and hydrogen
splitting water into hydrogen and oxygen
splitting water into hydrogen and oxygen
absorbing carbon dioxide
A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the container in direct sunlight. The scientist observes small bubbles on the surfaces of the plant’s leaves on days 1 and 2, but no bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis. Which substance should be added to the water in order for the bubbles to reappear?(1 point)
Responses
oxygen
oxygen
glucose
glucose
carbon dioxide
carbon dioxide
hydrogen gas
The substance that should be added to the water in order for the bubbles to reappear is carbon dioxide. This gas is required for photosynthesis to occur, and the plant likely used up all the available carbon dioxide during the first two days of the experiment. Adding more carbon dioxide to the water would allow the plant to continue performing photosynthesis and producing oxygen bubbles.
ATP is(1 point)
Responses
stored during cellular respiration
stored during cellular respiration
released when carbon dioxide and water form glucose
released when carbon dioxide and water form glucose
a form of energy that can be used and stored
a form of energy that can be used and stored
a form of energy that cannot be stored
ATP is a form of energy that can be used and stored. It stands for Adenosine Triphosphate and it is the primary molecule that cells use to store and transfer energy. During cellular respiration, glucose is broken down into ATP, and this molecule can then be used for various cellular processes requiring energy. Because it is a high-energy molecule, ATP can be used immediately as a source of energy for cell functions or it can be stored until needed.
ATP stores some of the energy from glucose molecules during cellular respiration. How is the remaining energy from these glucose molecules released?(1 point)
Responses
Excess light
Excess light
Excess heat
Excess heat
Excess carbon dioxide
Excess carbon dioxide
Excess water
The remaining energy from glucose molecules is released as heat during cellular respiration. While some energy is stored as ATP, not all of it can be stored in this form, and some of it is lost as heat during the many reactions involved in cellular respiration. This is why our bodies generate heat as a byproduct of cellular respiration.
One molecule of glucose is recycled into ___ molecules of carbon dioxide during cellular respiration.(1 point)
Responses
1
1
6
6
2
2
12
One molecule of glucose is recycled into 6 molecules of carbon dioxide during cellular respiration. This process occurs in the mitochondria of the cell, where glucose is broken down into pyruvate, which is then converted into acetyl-CoA and enters the Krebs cycle. During the Krebs cycle, the carbon atoms are released as carbon dioxide, which is then exhaled out of the body. Overall, the complete breakdown of one molecule of glucose results in the production of 6 carbon dioxide molecules.
Which role does photosynthesis play in the flow of energy? (1 point)
Responses
Photosynthesis provides radiant energy to all the organisms in the entire food chain.
Photosynthesis provides radiant energy to all the organisms in the entire food chain.
Photosynthesis converts radiant energy to chemical energy to be used by organisms in the food chain.
Photosynthesis converts radiant energy to chemical energy to be used by organisms in the food chain.
Photosynthesis is how plants break down glucose to use for energy.
Photosynthesis is how plants break down glucose to use for energy.
Photosynthesis allows plants to create energy for themselves to store and use for metabolism.