FREE AND STUDY GAMES ABOUT BIOL- MB EXAM 3

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FREE AND STUDY GAMES ABOUT BIOL- MB EXAM 3

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -85 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Energy released by the electron transport chain is used to pump H+ ions into which location?

Answer:

Mitochondrial intermembrane space Question 2: Is this true or false regarding the functioning of photosystem II? The P680 cholorphyll donates a pair of protons to NADPH, which is thus converted to NADP+

Answer:

False

Question 3: Name the inputs and outputs of Glycolysis

Answer:

Inputs: Glucose, NAD+, ADP+Pi

Outputs: Pyruvate, NADH, ATP

Question 4: Which of the following intermediary metabolites enters the citric acid cycle and is formed, in part, by the removal of carbon (CO2) from one molecule of pyruvate?

Answer:

Acetyl CoA

Question 5: Suppose that the concentration of CO2 available for the Calvin cycle decreased by 50% (because the stomata closed to conserve water).Correctly describe how O2 production would be affected? (Assume that the light intensity does not change.)

Answer:

The rate of O2 production would decrease because the rate of ADP and NADP+ production by the Calvin cycle would decrease.Question 6: Among the products of glycolysis, which compounds contain energy that can be used by other biological reactions?

Answer:

Pyruvate, ATP, and nADH Question 7: Name the inputs and outputs of Acetyl CoA Formation and the Citric Acid Cycle

Answer:

Inputs: Pyruvate, NAD+,ADP+Pi

Outputs:: CO2, NADH, ATP Question 8: One carbon dioxide molecule reacts in each "turn" of the Calvin cycle. How many turns of the cycle are required for the synthesis of one glucose molecule?

Answer:

6

Question 9: In C3 plants the conservation of water promotes _____.

Answer:

Photorespiration Question 10: When a compound accepts (gains) electrons, that compound becomes ___. Such a compound is often referred to as an electron acceptor.

Answer:

Reduced Question 11: From the following compounds involved in cellular respiration (pyruvate, CO2, ADP, Glucose, NAD+, Acetyl CoA, NADH,ATP, O2, coenzyme

• , choose those that are the net inputs and net outputs of the citric acid cycle.

Answer:

Net Inputs- NAD+, ADP, Acetyl CoA Net Outputs- CO2, CoA, NADH, ATP Neither- Glucose, O2, Pyruvate

Question 12: During electron transport, energy from ___ is used to pump hydrogen ions into the ___.

Answer:

NADH and FADH2... intermembrane space Question 13: In the thylakoid membranes, what is the main role of the antenna pigment molecules?

Answer:

Harvest photons and transfer light energy to the reaction-center chlorophyll Question 14: As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from?

Answer:

Cyclic electron flow Question 15: The reaction-center chlorophyll of photosystem I is known as P700 because

Answer:

This pigment is best at absorbing light with a wavelength of 700 nm.

Question 16: In addition to ATP, what are the end products of glycolysis?

Answer:

NADH and pyruvate

Question 17: After 3-PGA is phosphorylated, it is reduced by _____.

Answer:

NADPH Question 18: Match each product of pyruvate metabolism (lactate, ethanol, acetyl CoA) with the condition under which it is produced (Aerobic Oxidation, Fermentation in human muscle, fermentation in yeast and bacteria)

Answer:

Lactate- fermentation in human muscle Ethanol- fermentation in yeast and bacteria Acetyl CoA- Aerobic oxidation

Question 19: Sort the following items (NAD+, lactate, NADH, pyruvate) according to whether they are reactants or products in the anaerobic reduction of pyruvate during lactic acid fermentation.

Answer:

Reactants- Pyruvate + NADH Products- Lactate + NAD+ Question 20: Is this true or false regarding the functioning of photosystem II? Light energy excites electrons in an antenna pigment in a photosynthetic unit.

Answer:

True Question 21: In glycolysis, the carbon-containing compound that functions as the electron donor is ___.

Answer:

Glucose Question 22: When a compound donates (loses) electrons, that compound becomes ___. Such a compound is referred to as an electron donor.

Answer:

Oxidized Question 23: Suppose that a cell's demand for ATP suddenly exceeds its supply of ATP from cellular respiration. Which statement correctly describes how this increased demand would lead to an increased rate of ATP production?

Answer:

ATP levels would fall at first, decreasing the inhibition of PFK and increasing the rate of ATP production.Question 24: The oxygen consumed during cellular respiration is involved directly in which process or event?

Answer:

Accepting electrons at the end of the electron transport chain

Question 25: In cellular respiration, most ATP molecules are produced by ___.

Answer:

Oxidative phosphorylation