What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 5, Problem 2MC
Summary Introduction
Introduction:
Kinetic energy is an active form of energy.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
How is ATP produced in chloroplasts?
Select one:
a.
When a photon hits an ADP molecule, it is kicked to a higher energy level, so it can combine with P to form ATP
b.
an enzyme transfers the P group from a substrate to ADP, forming ATP
c.
water is split into protons, electrons and oxygen.
d.
When a photon hits a chlorophyll molecule, the energy is transformed into heat
e.
an electron transport chain creates a proton gradient over a membrane. ATP is made when these protons move passively through a large protein complex embedded in the membrane.
Light is needed for photosynthesis, because it
A. Provides energy, which is converted to chemical energy
b. Provides, heat energy, which is converted to chemical energy
c. Directly causes ATP production
d. Brings water into the chloroplast
e. Drives many enzymatic reactions
In the light reactions of photosynthesis, electrons within the pigment molecules that are embedded in the plasma membranes of the thylakoids are hit by photons of sunlight. This dramatically increases the energy in these electrons. When photons of light strike electrons in other kinds of molecules, the electrons are raised to high energy levels, but immediately drop back down to their ground states, re-emitting the photons. However, in the light reactions, an excited electron is passed to an electron acceptor molecule before it can drop back down to its ground state. The excited electron is then passed from the primary electron receptor to the electron transport chain and eventually ends up as part of a glucose molecule. If the pigments in the thylakoid are continually passing their electrons to other molecules, how do the pigments replace their missing electrons?
To replace the missing electrons, an enzyme removes the two hydrogen atoms from a water molecule.…
Chapter 5 Solutions
What Is Life? A Guide to Biology with Physiology
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following options best explains how less chlorophyll would affect the proces of photosynthesis in plants? 6. A. It would increase the rate of photosynthesis because of the increased production of food. B. It would limit the amount water plants are able to take in, resulting in a slower rate of photosynthesis. C. It would increase the production of oxygen because the plant would need to work hard to feed themselves. С. D. It would limit the amount of light absorbed by the plant and decrease the amount of food the plant is able to produce for itself.arrow_forwardPart 2: Matching Match each compound to a step that of the Light-Dependent Reaction. f. electron acceptor g. electron carrier h. chlorophyll II. i. NADPH reductase j. b,- f complex a. P700 b. Р680 C. P680 d. ATP synthase e. Photosystem I | 51. Light photons excite electrons from this part of the Reaction Centre. 52. Also known as Photosystem II. 53. Reduced by electrons removed from H,O through photolysis. 54. Uses energy released by redox reaction to pump H' ions into the thylakoid space. 55. Photons excite electrons that leave and are then replaced by electrons used to pump H° ions into thylakoid space. 56. This complex has the Reaction Centre used for cyclic photophosphorylation. 57. Protein that is embedded in the thylakoid membrane. 58. The enzyme that helps remove electrons from the thylakoid. 59. The enzyme that acts to form ATP with chemiosmosis.arrow_forwardChlorophyll a Chlorophyll b 400 450 500 550 600 650 700 Wavelength (nm) Plant chlorophyll chemicals will absorb, or take in, light wove energy in order to produce their own molecules used for cellular energy, Reflected light refers to thase wavelengths of light that will "bou of the chlorophyll and not be obsorbed. A scientist runs an experiment in which only light waves measuring between 490 and 600 nm are hitting the that would explain what would happen based upon the data in the chart. Chlorophyll a would absorb high amounts of light energy, but chloroplyll b would be absorbing low a Neither chlorophyl a nor b would be absorbing very much, if any light energy Chlorophyl b would absorb high amounts of light energy, but chlorophyll a would be absorbing lowa Both chlorophyl a and b would be absorbing high amounts of light. Absorptionarrow_forward
- Photosynthesis A. is the only energy-generating pathway for plants, cyanobacteria, and algae. B. consist two stages: light-dependent stage which fix CO₂, light-independent stage which generate glucose. C. can capture and convert energy from light to chemical energy in the form of ATP and NADPH. D. oxidize organic carbon molecule to CO₂, while reduce water to oxygen.arrow_forwardWhich of the following are reactants of the light reactions of photosynthesis. A. Glucose B. Water C. ATP D. NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forward1. During the light dependent reaction, the molecules within the membrane absorb light energy 2. high energy compounds light dependent portion of photosynthesis 3. an electron which is released by a process called and are produced in the in the thylakoid enters where it is energized and used to convert energy. 4. protons travel through located in the thylakoid membrane in a high energy compound. a process known as 5. The three stages of the light independent reaction are to produce and 6. The most abundant protein on earth is 7. You would need molecules of RuBp in order to create 1 molecule of glucosearrow_forward
- Which of the following are the products of the light reactions of photosynthesis. A. Glucose B. Water C. ATP D.NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forwardPlant and animal cells break down organic molecules by cellular respiration in the.. and most of the energy is used to regenerate .. ***. a. mitochondria ----- ATP O b. mitochondria ----- heat C. chloroplast. Heat d. mitochondria. AMP ......... O e.chloroplast. ATP Next pag Previous actiarrow_forwardYou are a marine biologist sampling an offshore ecosystem. One day, you find a red organism floating in one of your nets. It has structures that resemble the leaves and stems of a plant. You hypothesize that this organism might be photosynthetic. Describe how you could test this hypothesis using a pH indicator solution. a. In detail, describe the steps you would take and the reactants of photosynthesis required. b. What change in pH would indicate that the organism was undergoing photosynthesis, and how would the indicator respond?arrow_forward
- Identify which of the following statements is a lie? Select one: a. Even if plants have red leaves, they still perform photosynthesis. b. Photosynthesis is vital in plants to produce food and energy they need for growth and cellular respiration. Therefore, all plants need the same amount of sunlight to make enough food to grow. c. Aside from chlorophyll α and chlorophyll b in plants, plants also have carotenoids, which help plants absorb light energy for use in photosynthesis.arrow_forward1. Which of the following causes the formation of ATP during the light dependent reaction? A. It is caused by the electrochemical gradient created by the splitting or water molecules B. It is caused by the increase or oxygen gas in the system C. It is created when the electrons allow the attachment of an inorganic phosphate to ADP D. The photons energize the activation of the ATP synthase, thus combining an inorganic phosphate to ADP. 2. What is the purpose of splitting water in photosystem II? A. To create an electrochemical gradient in the thylakoid B. To create oxygen molecules C. To make the environment acidic D. To provide free hydrogen ions that would soon attach to inorganic phosphates in ATP synthesisarrow_forwardThe light dependent reactions of photosynthesis are characterized by A. oxidation of carbon dioxide, release of oxygen, synthesis of glucose. B. release of oxygen, fixation of carbon dioxide, hydrolysis of ATP. C. oxidation of water, reduction of NADP+ , hydrolysis of ATP. D. reduction of oxygen, oxidation of NADPH, formation of ATP. E. oxidation of water, reduction of NADP+ , formation of ATP.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY