test 3 practice test

33) The light reactions of photosynthesis supply the Calvin cycle with

A) ATP and NADPH.

9) Which of the following happens in brewer's yeast when oxygen is not available?

A) ATP will be generated by glycolysis, and pyruvate will be reduced to ethanol and CO2

14) Which of the listed statements describes the results of the following reaction? C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy A) C6H12O6 is oxidized and O2 is reduced. B) CO2 is reduced and O2 is oxidized. C) O2 is oxidized and H2O is reduced. D) O2 is reduced and CO2 is oxidized. E) C6H12O6 is reduced and CO2 is oxidized.

A) C6H12O6 is oxidized and O2 is reduced.

31) Circular electron flow occurs in the light reactions of photosynthesis during which of the flowing?

A) Electrons are passed from photosystem I to the electron transport chain to make ATP

18) Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule?

A) Glycolysis

22) Which of the following statements is false? A) In the redox reaction of photosynthesis, water is reduced and carbon dioxide is oxidized B) The Calvin cycle occurs in the stroma of a chloroplast C) Carotenoids are pigments found in chloroplasts that broaden the spectrum of absorbed light D) Chlorophyll contains an Mg atom that is necessary for its proper function E) When light shines on purified chlorophyll in a test tube, the chlorophyll will emit heat and light (fluorescence) when its electrons return to the ground state

A) In the redox reaction of photosynthesis, water is reduced and carbon dioxide is oxidized

Which of the following molecules is used to carry electrons to the electron transport chain during cellular respiration?

A) NADH

35) In mechanism, photophosphorylation is most similar to

A) Oxidative phosphorylation in cellular respiration.

19) In mitochondria, exergonic redox reactions

A) Provide the energy that establishes the proton gradient.

39) Linkage of a mechanical, chemical, or electromagnetic stimulus to a specific cellular response is known as what?

A) Signal transduction

12) During the citric acid cycle, how many ATP are produced from one acetyl CoA by substrate level phosphorylation?

B) 1

25) Photorespiration occurs in C3 plants in which of the following conditions?

B) During the day, when the stomata are closed

6) As electrons are passed down the electron transport chain, what work is being done?

B) H+ ions are pumped from a low concentration to a higher concentration

15) Which electron carrier(s) are produced by the citric acid cycle?

B) NADH and FADH2

8) The final electron acceptor of the electron transport chain in aerobic oxidative phosphorylation is which of the following?

B) O2

23) Which of the following correctly orders the movement of electrons during the light reactions of photosynthesis?

B) Photosystem II => Electron transport chain => Photosystem I => NADPH

3) When a cell reduces glucose to CO2 and H2O, the CO2 is released during which of the following processes?

B) Pyruvate oxidation and the citric acid cycle

40) Which of the following is an example of cell-cell communication that requires direct contact between the cells?

B) Synaptic signaling

4) Near the beginning of the citric acid cycle, citrate is converted its structural isomer, isocitrate. In the next step, what happens to the isocitrate.

C) Isocitrate is oxidized, NAD+ is reduced to NADH, and one CO2 is produced

24) When light strikes the light harvesting complex of photosystem I, which of the following occur?

C) Energy is passed from one chlorophyll molecule to another until it reaches the P700 chlorophyll molecules

17) The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is the

C) H+ concentration across the membrane holding ATP synthase.

20) In which of the following is photosynthesis likely to occur?

C) Mesophyll

38) In the Fall, when some leaves appear red, what wave length of light is being reflected from the red leaves?

C) Red

The enzyme that is necessary for fixing carbon at position A is what? Look at picture

C) Rubisco

28) How many CO2 molecules need to enter the Calvin cycle in order to generate the molecule at position B? Look at picture

C) Three

2) The beginning of the citric acid cycle starts with which of the following molecules?

D) Acetyl Co-A

32) Where does the Calvin cycle take place?

D) Chloroplast stroma

21) When light strikes a chloroplast which of the following will occur?

D) Electrons in chlorophyll will be excited and move to an outer electron shell

34) Which of the following does not occur during the Calvin cycle? A) Consumption of ATP B) Carbon fixation C) Oxidation of NADPH D) Release of oxygen E) Regeneration of the CO2 acceptor

D) Release of oxygen

30) Which of the following processes is most directly driven by light energy?

D) Transfer of elections from chlorophyll molecules to a primary electron acceptor

1) From one glucose molecule, what is the net production of molecules at the end of glycolysis?

D) Two pyruvate, two ATP, two NADH

37) Which of the following is NOT produced from the G3P generated in the Calvin cycle? A) Glucose B) Fructose C) Cellulose D) Carbohydrate E) ATP

E) ATP

13) Which enzyme is instrumental in the production of ATP through oxidative phosphorylation?

E) ATP synthase

16) Which of the following processes are a series of redox reactions that break a six carbon sugar down to two carbons attached to CoA?

E) Chemiosmosis and the electron transport chain

5) Oxidative phosphorylation produces ATP by combining which of the following processes?

E) Electron transport chain and chemiosmosis

26) The light reactions of photosynthesis and oxidative phosphorylation during cellular respiration share many similar features, EXCEPT which of the following? A) An H+ gradient is formed across a plasma membrane B) Many of the critical protein complexes are embedded in a plasma membrane C) They utilize an electron transport chain D) ATP is produced E) Oxygen is used as the final electron acceptor

E) Oxygen is used as the final electron acceptor

29) The name of the molecule at position C is what? Look at picture

E) Ribulose bisphosphate

36) Plants exchange gasses with the atmosphere using what structure?

E) Stomata

11) Organic molecules other than glucose can be used to generate ATP. Fatty acids stored in fat are used in cellular respiration and enter the pathway at what point?

E) Two carbon fragments are clipped off and converted to acetyl CoA

10) A critical step that is necessary to initiate glycolysis is which of the following?

E) Using ATP to phosphorylate glucose