Biology Assessment #2
Explain why ATP is important in biochemical reactions.
ATP stands for adenosine triphosphate. It is a molecule found in the cells of living organisms. It is important because it transports energy necessary for all cellular metabolic activities.
Which two statements correctly describe one similarity and one difference between cellular respiration and photosynthesis?
Cellular respiration and photosynthesis both involve water. Cellular respiration uses sugar, and photosynthesis produces sugar.
A scientist places a fast-growing plant in a sealed container with a measured amount of water. She hypothesizes that the plant will use up all the water within four days. After five days, she observes that there is still water in the container. Which explains why water is still present?
It is a product of cellular respiration.
Which best explains why cellular respiration in plants and other organisms is dependent on photosynthesis?
Photosynthesis provides the materials that fuel cellular respiration.
A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which statement best describes how these processes are related to one another?
Products of one process are used as some of the reactants for other process.
Four students classified the main energy conversions that occur during photosynthesis and cellular respiration. Which student best classified the energy conversions that occur in two processes?
Student 4 Photosynthesis-solar to chemical Cellular Respiration-chemical to chemical
A scientist observed that during the course of a chemical reaction a number of ATP molecules was reduced. What did the scientist most likely learn from the observation?
The reaction required an input of energy.
A scientist observed that during the course of a chemical reaction the number of ATP molecules were reduced. What did the scientist most likely learn from the observation?
The reaction required an input of energy.
A plant cell uses the molecules in the list to synthesize a protein. What role do the ATP molecules play in the protein synthesis process?
They provide energy.
The light given off by fireflies is due to the oxidation of d-luciferin, a reaction catalyzed by the enzyme luciferase. A scientist carries out the reaction artificially in a lab by using two mixtures, one with ATP and the other without ATP. The scientist observes that only the mixture containing ATP emits light. What is the role of ATP in this reaction?
the breaking of high-energy bonds in ATP provides energy for this reaction.