1. Chlorophyll absorbs Light 2. Photosynthesis takes place in three stages: (a) capturing light energy, (b) synthesizing and and (c) the Calvin cycle. 3. In the dark, or light-independent reactions, carbon dioxide is fixed in the Calvin cycle by the enzyme energy and begins the process of photosynthesis. 4. The primary end product of the light-independent reactions is 5. The C4 and CAM pathways of photosynthesis both make use of the enzyme 6. In the chloroplast, electron transport takes place on membranes of the thylakoid membrane 7. During linear electron transport, both of the 8. Light is a form of energy that travels in wave packets called 9. photosynthesis. 10. The CAM mode of photosynthesis represents a of photosynthesis. function. is the only pigment that can transfer light energy to the carbon fixation reactions c separation of the main ever

1. Chlorophyll absorbs Light 2. Photosynthesis takes place in three stages: (a) capturing light energy, (b) synthesizing and and (c) the Calvin cycle. 3. In the dark, or light-independent reactions, carbon dioxide is fixed in the Calvin cycle by the enzyme energy and begins the process of photosynthesis. 4. The primary end product of the light-independent reactions is 5. The C4 and CAM pathways of photosynthesis both make use of the enzyme 6. In the chloroplast, electron transport takes place on membranes of the thylakoid membrane 7. During linear electron transport, both of the 8. Light is a form of energy that travels in wave packets called 9. photosynthesis. 10. The CAM mode of photosynthesis represents a of photosynthesis. function. is the only pigment that can transfer light energy to the carbon fixation reactions c separation of the main ever

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter20: The Protists

Section: Chapter Questions

Problem 4CT: Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of...

See similar textbooks

Similar questions

The Calvin cycle begins when CO2 reacts with (a) phosphoenolpyruvate (b) glyceraldehyde-3-phosphate (c) ribulose bisphosphate (d) oxaloacetate (e) phosphoglycerate
Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?
What is the significance that the combined absorption spectra of chlorophylls a and b roughly match the action spectrum of photosynthesis? Would photosynthesis be more efficient if their individual absorption spectra coincided exactly?
In ________, electrons that have been energized by light contribute their energy to add phosphate to ADP, producing ATP. (a) crassulacean acid metabolism (b) the Calvin cycle (c) photorespiration (d) C4 pathways (e) photophosphorylation
40. After light excites electrons and they leave Photosystem II to travel down the electron transport chain. How are these electrons replaced in Photosystem II? Group of answer choices a. Oxygen is reduced and the electrons are given to the chlorophyll molecules of photosystem II. b. Carbon Dioxide is split, and the electrons are given to the chlorophyll molecules of photosystem II. c. Water is split, and the electrons are given to the chlorophyll molecules of Photosystem II. d. Hydrogen undergoes fusion and the electrons are given to the chlorophyll molecules of photosystem II
Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correct
46. An organism that cannot produce its own food is called a photoautotroph. a true b false 47. The one thing that all photosynthetic organisms have in common is chloroplasts. a true b false 48. The organelle that is unique to eukaryotic photoautotrophs is the chromoplast. a true false 49. An electron that has gained energy from light may transfer that energy to a neighbouring electron, and then return to its ground state. a true b false 50. The structure that connects stacks of thylakoids is the grana. a true false 51. Light is a form of energy that travels in wave packets called protons. a true b false
2. Sugar is made in the chloroplast through CO2 assimilation by the Calvin cycle. This cycle involves 11 enzymes and produces carbohydrates from atmospheric CO2 using NADPH and ATP supplied by the light reactions. Chloroplast phosphoglycerate kinase (cpPGK) catalyzes the conversion of 3-phosphoglycerate to 1,3-bisphosphoglycerate using ATP (step #2). CHI-O-PO C=0 Rate of CO₂ assimilation (μmol CO₂ m² s¯¹) H-C-OH H-C-OH 6 ADP+6P, Transketolase CH,-O-PO 6 Ribulose-1,5-bisphosphate 6 ATP 40 H C=O H-C-OH CH,-O-PO 10 Glyceraldehyde-3-phosphate 30 20 6C0₂ 10 Ribose phosphate isomerase Phosphoribulokinase To cytoplasm C=O H-C-OH CH,-o-PO, 2 Glyceraldehyde-3-phosphate CH,-O-PO2 HO-C-COO C=0 H-C-OH CH,-O-PO 6 Carboxylase intermediate Ribulose bisphosphate carboxylase 1 CALVIN CYCLE H C=O H-C-OH CH,-O-PO 2 12 Glyceraldehyde-3-phosphate Sugars Glyceraldehyde-3-phosphate dehydrogenase (3) 04 * 12 P PEA 400 800 pCi (μmol mol ¹) 9 C=0 H-C-OH Phosphoglycerate kinase 2 CH,-O-PO 12 3-Phosphoglycerate…
1. Where do the protons used in the light reactions come from? 2. What is the significance of light reaction? 3. What are the products of light reactions that are used in the Calvin cycle? 4. What are the roles of ATP and NADPH in photosynthesis?
43. Where do electrons from Photosystem I go after they get excited by light? Group of answer choices a. The high-energy electron travels down a short second leg of the electron transport chain. At the end of the chain, the electron is passed to NADP+ to make NADPH. b.They travel down a second electron transport chain and are donated to oxygen which then bonds to hydrogen ions to form water. c. The high-energy electron travels down a short second leg of the electron transport chain and they are donated to ADP, which is then converted to ATP. d. They remain excited and then they travel to Photosystem II where they get even more excited until they spontaneously combust.
45. Which of the following statements about the light reactions of photosynthesis is NOT true? Group of answer choices a. The splitting of water molecules provides a source of electrons. b. Chlorophyll and other pigments absorb light energy, which excites electrons. c. ATP is generated by photophosphorylation. d. Electrons from water are given to the chlorophyll molecules of Photosystem I.
44. What does light do when it strikes the chlorophyll molecules of Photosystems I and II? Group of answer choices a. Light causes glucose to be synthesized directly inside the chlorophyll molecules of photosynthesis. b. Light causes the conversion of water into carbon dioxide, oxygen and electrons. c. Light directly causes the carbon dioxide to attach to RuBP during the carbon fixation stage of the Calvin Cycle. d. Light causes electrons to get excited and travel down an electron transport chain embedded in the thylakoid membrane.