Biology Chapter 7 Quiz – Flashcards

1) In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the A) stomata. B) thylakoid. C) matrix. D) stroma.

2) Thylakoids are arranged in stacks called A) cristae. B) stomata. C) grana. D) vacuoles.

3) Where is chlorophyll found in a plant cell? A) stroma B) thylakoid membranes C) cytoplasm D) cristae

4) What is the source of energy that provides the boost for electrons during photosynthesis? A) light B) NADPH C) cellular respiration D) ATP

5) Which of the following statements comparing photosynthesis and cellular respiration is false? A) ATP is not produced during photosynthesis; it is produced only during cellular respiration. B) Photosynthesis is ultimately powered by light energy and respiration by the chemical energy of fuel (glucose) molecules. C) Photosynthesis consumes CO2; respiration consumes O2. D) Photosynthesis produces O2; respiration produces CO2.

6) Which of the following are produced during the light reactions of photosynthesis? A) glucose, ADP, NADP+ B) glucose, ADP, NADP+, CO2 C) ADP, NADP+, O2 D) ATP, NADPH, O2

7) Which of the following is part of the light reaction? A) carbon fixation B) reduction of carbon C) regeneration of NADP+ D) formation of waste products in the form of O2

8) Which of the following are produced during the Calvin cycle? A) G3P ( glucose), ADP, NADP+ B) G3P (glucose), ADP, NADP+, CO2 C) ATP, NADPH, O2 D) ATP, NADPH, CO2

9) Carbon fixation A) occurs when carbon atoms from CO2 are incorporated into an organic molecule. B) supplies the cell with ATP. C) occurs during the light reactions. D) provides the cell with a supply of NADPH molecules.

10) The full range of electromagnetic energy is called the ________ spectrum. A) visible B) electromagnetic C) energy D) ultraviolet

11) Why are most plants green? A) Chlorophyll a reflects green light. B) Chlorophyll a absorbs green light. C) Chlorophyll b primarily uses green light as the source of energy for photosynthesis. D) Green helps plants blend into their environment as a sort of camouflage.

12) Which of the following colors contributes the least energy to photosynthesis? A) blue B) red C) orange D) green

13) Which of the following wavelengths of light would you expect to be reflected or transmitted by chlorophyll a? A) blue B) green C) yellow D) red

14) Which of the following molecules is a product of photosynthesis? A) CO2 and chlorophyll B) glucose (or G3P) and O2 C) O2 and CO2 D) glucose (or G3P) and CO2

15) Clusters of light-gathering pigments (the light harvesting complex) in a photosystem A) pass energy to the reaction center. B) are found in the roots of plants. C) absorb electrons. D) break down H2O.

16) The energy that excites the photosystems is supplied by A) electrons passing down the electron transport chain. B) ATP. C) photons, or light D) NADPH.

17) The electron transport chains of the light reactions A) are located in the stroma. B) shuttle electrons from photosystem II to photosystem I. C) provide energy for the citric acid cycle. D) are found on the plasma membrane of mesophyll cells.

18) As a result of the cascade of electrons down the electron transport chains of the light reactions, A) NADPH is reduced to NADP+. B) NADPH is oxidized to NADP+. C) NADP+ is reduced to NADPH.

19) The electrons lost from the reaction center of photosystem II are replaced by electrons from A) CO2. B) ATP. C) H2O. D) photosystem I.

20) Photosystem II A) receives electrons from photosystem I. B) passes electrons to the electron transport chain and then to photosystem I. C) does not have a reaction center. D) releases CO2 as a by-product.

21) In chloroplasts, ATP synthase A) catalyzes the Calvin cycle. B) phosphorylates ADP to ATP. C) is found in the stroma. D) helps produce the concentration gradient of H+.

22) In photosynthesis, the chemiosmotic production of ATP A) requires oxygen. B) is similar to the production of ATP in mitochondria. C) is done by the Calvin cycle. D) is a result of the oxidation of glucose.

23) Mitochondria transfer ________ energy from ________ to ATP; chloroplasts transform ________ energy into the chemical energy of ATP. A) chemical; glucose; light B) glucose; light; chemical C) light; glucose; kinetic D) food; light; nuclear

24) Photosynthetic organisms derive their carbon from A) carbon monoxide. B) carbon dioxide. C) hydrocarbons. D) methane.

25) ATP and NADPH A) power sugar synthesis during the Calvin cycle. B) are products of the Calvin cycle. C) provide energy to photosystem I and photosystem II. D) are used in the electron transport chain to pump H+ into the thylakoid space.

26) The Calvin cycle constructs ________, an energy-rich molecule that a plant cell can then use to make glucose or other organic molecules. A) G3P B) ATP C) NADH D) carbon dioxide

27) Plants use sugars as A) a fuel for photosynthesis. B) a starting material for the Calvin cycle. C) a source of electrons for chemiosmosis. D) a fuel for cellular respiration and a starting material for making other organic molecules.

28) Plant cells A) lack mitochondria and chloroplasts. B) lack mitochondria but have chloroplasts. C) have mitochondria but do not have chloroplasts. D) have mitochondria and chloroplasts.

29) Put the following steps of the light reactions in the correct order: 1. Light excites an electron from photosystem I. 2. Light excites an electron from photosystem II. 3. Electrons reduce NADP+ to NADPH. 4. Electrons pass through an electron transport chain, which generates a H+ gradient used to make ATP. A) 1, 2, 3, 4 B) 1, 4, 2, 3 C) 2, 4, 1, 3 D) 2, 3, 1, 4