EBK BIOLOGY TODAY AND TOMORROW WITHOUT
5th Edition
ISBN: 8220100557187
Author: STARR
Publisher: CENGAGE L
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Chapter 5, Problem 4SQ
Summary Introduction
Concept introduction: In the plant cells, two types of reactions take place as part of photosynthesis: light-dependent reactions (light reactions) and light-independent reactions (dark reactions). The products of light-dependent reactions are nicotinamide adenine dinucleotide phosphate hydrogen (NADPH) and adenosine triphosphate (ATP). The above mentioned products (NADPH and ATP) are used in light-independent reactions.
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In the light-dependent reactions,______ . a. carbon dioxide is fixed c. CO2 accepts electrons b. ATP forms d. sugars form
The main purpose of the light-independent reactions is to ________.
a.
convert solar energy to chemical energy
b.
convert solar energy to ATP for short-term energy use
c.
build carbohydrates for long-term energy storage
The atoms in oxygen molecules released during photosynthesis come from_____ . a. sugars b. water c. O2 d. CO2
Chapter 5 Solutions
EBK BIOLOGY TODAY AND TOMORROW WITHOUT
Ch. 5 - Biofuels A lot of energy is locked up in the...Ch. 5 - Biofuels A lot of energy is locked up in the...Ch. 5 - Biofuels A lot of energy is locked up in the...Ch. 5 - Most of the carbon that land plants use for...Ch. 5 - Prob. 2SQCh. 5 - Which of the following statements is incorrect? a....Ch. 5 - Prob. 4SQCh. 5 - Prob. 5SQCh. 5 - Prob. 6SQCh. 5 - Prob. 7SQ
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- 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) photophosphorylationarrow_forwardA. Highlight all the organisms that CAN do photosynthesis (you might need to google search what these are) Venus fly trap Mycorrhizal fungus Cyanobacteria Red algae Sponges Corn (Zea mays) B. Summarize the purpose of photosynthesis______ C. How could you tell or measure the rate of photosynthesis? ____ D. What is a redox reaction? ___ E. When the water molecule donates its electron to the chlorophyll molecule the water molecule was ______ while the chlorophyll was ______. F. When the carbon chain gains electrons from NADPH the carbon chain has been _____. G. Discuss how the chloroplast structure is arranged using the following terms (include picture too) chloroplast, thylakoid, stroma, chlorophyll, H. Light reaction and Calvin cycle: what is the overall purpose of each one?arrow_forwardHydrogen ions will diffuse out of the thylakoid ; the concentration of H+ ions inside the thylakoid is higher than on the outside. The difference in H+ is known as a _____. a. ATP synthase b. photophosphorylation c. molecule of ATP d. chemiosmotic gradientarrow_forward
- When a photosystem absorbs light,_____ . a. sugar phosphates are produced b. electrons are transferred to ATP c. RuBP accepts electrons d. its special pair emits electronsarrow_forwardThe metabolic pathway of photosynthesis is categorized as _____ because its reactions "build" more complex molecules from simpler ones. A. endergonic B. exergonic C. catabolic D. anabolicarrow_forwardThe light reactions of photosynthesis provide A. RuBP B. carbon dioxide C. chemical energy D. carbohydrate E. ADParrow_forward
- Photo-oxidation is: A. photorespiration B. photolysis C. light and oxygen induced breakdown D. All of the abovearrow_forwardFrom which component of the light-dependent reactions does NADPH form most directly? a. photosystem II b. photosystem I c. cytochrome complex d. ATP synthasearrow_forwardWhich is NOT produced during the light-dependent reactions A. ATP B. Oxygen C. NADPH D. Sugararrow_forward
- Match each term with the best description. ____ PGAL a. absorbs light ____ CO2 fixation b. converts light to ____ photolysis chemical energy ____ ATP forms; c. self-feede NADPH does not d. electrons cycle back ____ photorespiration to photosystem I ____ photosynthesis e. problem in C3 plants ____ pigment f. Calvin–Benson cycle ____ autotroph product g. water molecules split h. rubisco functionarrow_forwardWhich of the following proteins is NOT involved in cyclic electron flow during the light reaction? A. ferredoxin B. plastocyanin C. photosystem I D. photosystem IIarrow_forwardThe source of electrons that fuel the chloroplastic electron transport chain is ___ a. water b. NADPH c. chlorophyll d. NADH e. glucosearrow_forward
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