Honors Biology Ch. 10

The reactions of photosynthesis are divided into two categories: a. light-independent reactions and carbon fixation reactions. b. light-dependent reactions and citric acid cycle. c. carbon fixation reactions and oxygen fixation reactions, d. light-dependent reactions and carbon fixation reactions. e. chemiosmosis and photochemical reactions.

light-dependent reactions and carbon fixation reactions

An electron absorbs a photon of light energy and becomes energized; the electron shifts from a ______ atomic orbital to a _____ atomic orbital. a. low energy; high energy b. fluorescing; ground state c. high energy; low energy d. ground state; low energy e. None of the answer choices are correct.

low energy; high energy

The reactions that occur in the thylakoid membranes are: a. the energy-releasing reactions. b. the carbon fixation reactions. c. the light-dependent reactions. d. the sugar-producing reactions, e. the photorespiration reactions.

the light-dependent reactions

All of the following statements are correct regarding the Calvin cycle of photosynthesis except a. the reactions are all enzyme mediated. b. the 5 carbon sugar RuBP is constantly being regenerated. c. these reactions begin soon after sundown and end before sunrise. d. the intermediate product is PGAL e. the energy source utilized is the ATP and NADPH obtained through the light reactions.

these reactions begin soon after sundown and end before sunrise

Oxygen produced by the light reactions of photosynthesis comes directly from: a. glucose. b. H2O. c. CO2. d. light. e. ATP.

H2O

Electrons that are excited to a higher energy level may be transferred to an electron acceptor or may return to a ground state. If the latter occurs, energy will be released in a process known as: a. photoelectron degradation. b. fluorescence. c. porphyrin. d. photoelectron hydrolysis. e. photoelectron deconfiguration.

fluorescence

14. Which chemical has the most energy? a. ribulose-1,5- bisphosphate (RuBP) b. phosphoglyceraldehyde (PGAL) c. glucose d. diphosphoglycerate (GAP) e. phosphoglycerate (PGA)

glucose

A group of thylakoid discs make up: a. a vacuole. b. the stroma. c. the mesophyll layer. d. a granum. e. a chloroplast.

a granum

In the overall reactions of photosynthesis, it appears that hydrogen atoms are transferred from water to carbon dioxide to form a carbohydrate. This type of reaction is classified as: a. a hydrolytic reaction. b. a catabolic reaction. c. a redox reaction. d. an oxidation reaction. e. an anaerobic reaction.

a redox reaction

Chlorophyll: a. transmits red and blue light, and absorbs green light. b. transmits red and blue light, and reflects green light. c. absorbs red and blue light, and reflects green light. d. reflects red and blue light, and absorbs green light. e. absorbs red, blue, and green light.

absorbs red and blue light, and reflects green light

All organisms are classified into two general trophic groups. These two groups are: a. consumers and decomposers. b. anaerobic autotrophs and aerobic autotrophs. c. autotrophs and heterotrophs. d. organic and inorganic. e. autotrophs and producers.

autotrophs and heterotrophs

Light behaves not only as waves, but also as particles, which are referred to as: a. protons. b. photons. c. electrons. d. radiation. e. neutrons.

photons

The process by which light energy is converted into the stored chemical energy of organic molecules is: a. fermentation. b. diffusion. c. photosynthesis. d. respiration. e. None of these.

photosynthesis

By definition, substances that absorb visible light are called: a. porphyrins. b. pigments. c. hydrocarbons. d. nucleotides. e. photons.

pigments

Plants, algae, and certain bacteria are: a. chemosynthetic. b. inorganic synthesizers. c. independent trophs. d. producers. e. consumers.

producers

The energy of a photon of light is least for _____ light. a. orange b. red c. blue d. violet e. green

red

Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect oh which of the following processes? a. none of the above. b. synthesis of ATP. c. splitting of water. d. the absorption of light energy by the chlorophyll molecule, e. the flow of electrons from photosystem II to photosystem I.

synthesis of ATP

Which of these colors contributes the least energy to photosynthesis? a. orange b. violet c. blue d. green e. red

green

How many electrons are needed to reduce one molecule of NADP+ to NADPH? a. 2 b. 5 c. 4 d. 3 e. 1

2

Thylakoid membranes are involved in ______ synthesis. a. NADP b. RuBP c. PEP d. glucose e. ATP

ATP

The reactants of the Calvin cycle are: a. C02, H20, and ATP. b. H20, ATP, and NADPH. c. CO2, ADP, and NADP+. d. CO2, ATP, and NADPH. e. H20, ATP, and NADPH.

CO2, ATP, and NADPH

Noncyclic electron transport needs a constant supply of electrons. These are obtained from: a. glucose. b. ATP. c. H2O. d. light. e. CO2

H2O

Which of the following is not one of the intermediates or products of the carbon fixation reactions? a. NADPH b. phosphogylcerate (PGA ) c. ribulose-1,5- bisphosphate d. PGAL e. glucose

NADPH

Ribulose phosphate is synthesized from: a. NADP+. b. PGAL. c. RuBP. d. C02. e. pyruvate.

PGAL

The following (P through U) are the main steps of ATP synthesis in the light dependent reactions of photosynthesis, which answer places them in the correct order? P. H+ concentration gradient established Q. H+ diffuses through a transport protein. R. Carriers use energy from electrons to move H+ across membrane S. Electrons from photosystem II pass along electrons transport chain. T. Light excites electrons in photosystem II. U. Energy of H+ flow and ATP Synthetase makes ATP. a. TSRPQU b. TSRUQP c. PQTSRU d. PQUSTR e. STPQRU

TSRPQU

The most important photosynthetic pigment(s) is(are): a. carotenoids, (yellow, orange) b. chlorophyll a. c. xanthophy11s.(brown) d. chlorophyll b. e. All of these are equally important for photosynthesis.

chlorophyll a

The first event in photosynthesis is the a. formation of phosphoglyceric acid. b. fixation of carbon dioxide. c. donation of an electron from the photosystem to an acceptor. d. formation of phosphoglyceraldehyde. e. breakdown of the thylakoid membrane.

donation of an electron from the photosystem to an acceptor

The synthesis of ATP as a result of the light-dependent reactions of photosynthesis is an reaction that is coupled to the diffusion of down their concentration gradient. a. energy-releasing; hydrogen ions b. energy-acquiring; electrons c. exergonic; electrons d. endergonic; protons e. oxidation; water

endergonic; protons

Which term is not correctly matched with the appropriate energy source or carbon source? a. autotroph-carbon fixation. b. heterotroph-light energy sources c. chemotroph-chemical energy sources d. phototroph-light energy sources e. All of the choices are correct.

heterotroph-light energy sources

ATP is formed when ______ the thylakoid lumen. a. electrons enter b. hydrogen ions leave c. electrons leave d. hydrogen ions enter e. water is split in

hydrogen ions leave

You have just discovered a new flower species that has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow. What wavelengths of visible light are not being absorbed by this pigment? a. green and yellow. b. red and yellow. c. green, blue, and violet. d. blue and violet. e. blue, green, and red

red and yellow

In the process of carbon fixation. RuBP attaches a carbon dioxide to produce a six carbon molecules, which is then split to produce two molecules of phosphglycerate (PGA). After phosphorylation and reducton produces PFAL what more needs to happen to complete the Calvin Cycle? a. addition of a pair of electrons from NADPH. b. regeneration of RuBP. c. regneration of NADP+ d. regneration of ATP from ADP.

regeneration of RuBP

The first step in the Calvin cycle is the attachment of carbon dioxide to: a. ribulose-1,5-biphosphate (RuBP) b. phosphoglycerate c. diphosophoglycerate (GAP). d. Rubisco. e. None of the above.

ribulose-1,5-biphosphate (RuBP)

In C3 plants, the ____ are typically closed at night and open during the daytime to allow for gas exchange. a. grana b. epidermis c. cuticles d. stomata e. spongy mesophyll

stomata

In a chloroplast, there is an outer and an inner membrane. The inner membrane encloses a fluid filled region called the: a. thylakoid. b. electron acceptor. c. grana. d. stroma. e. pigment.

stroma

What is the primary function of the Calvin Cycle? a. transport RuBP out of the chloroplast. b. synthesize simple sugars from carbon dioxide. c. split water and release oxygen. d. use NADPH to release carbon dioxide.

synthesize simple sugars from carbon dioxide

Which of the following is not associated with the thylakoid membranes? a. cytochrome complex b. ATP synthase c. electron transport chain d. photosystems I and II e. the Calvin cycle

the Calvin cycle

The electron transport chain of photosynthesis is located in the: a. mitochondria. b. thylakoid membrane. c. cristae. d. outer chloroplast membrane. e. chloroplast stroma.

thylakoid membrane

Chlorophyll and accessory photosynthetic pigments are associated with the: a. stroma. b. stroma grana. c. mesophyll membranes. d. light reaction centers of the stroma lamellae. e. thylakoid membranes.

thylakoid membranes