Harmful mutations in the mitochondrial genes coding for the electron transport w

Question

Harmful mutations in the mitochondrial genes coding for the electron transport would must affect a. oxygen diffusion into erythrocytes b. urine flow out of the urethra c. rapid beating of a hummingbird's wings d. formation of the from free phospholipids e. the Calvin cycle A specific poison blocks H^+ transport across the inner membrane of the mitochondria. How will this directly affect the cell? a. glucose will not be broken down at all b. The citric acid cycle (Krebs cycle) will be inhibited c. ATP will not be synthesized in sufficient amounts d. carbon dioxide will not be released from cells e. oxygen intake will the inhibited The oxygen consumed during cellular respiration is involved directly in which or event? a. the of ADP to form ATP b. the citric acid cycle c. the oxidation of pyruvate to acetyl CoA d. glycolysis e. accepting electron, at the end of the election transport chain Which of the following statements best describes the relationship between and cellular respiration: a. photosynthesis produces organic molecules that are oxidized during cellular respiration to produce ATP. b. plants and other photosynthetic organisms get energy from photosynthesis and animals get energy from cellular respiration. c. photosynthesis and cellular respiration use CO_2 and H_2 O as substrates. d. photosynthesis and cellular respiration are exergonic, energy releasing reactions.

Explanation / Answer

30. Mitochondrial DNA is primarily involved in coding for proteins needed for protein complexes of the electron transport chain and ATP synthase. Therefore, harmful mutations in mitochondrial genes would most affect

1) formation of phospholipid bilayer from free phospholipids

2) calvin cycle

due to the inability of plant to fix carbon.

option: d, e

31. The electron transport chain is a series of proteins and organic molecules found in the inner membrane of the mitochondria. Electrons are passed from one member of the transport chain to another in a series of redox reactions. Energy released in these reactions is captured as proton gradient which is then used to make ATP.

Therefore, if a specific proton blocks H+ transport across inner membrane of mitochondria, ATP will not be synthesised in sufficient amounts.

option: C

32. The oxygen consumed during cellular respiration is involved directly in

1) oxidation of pyruvate to acetyl coA

2) Accepting electrons at the end of electron transport chain

Option: c, e

33. Photosynthesis produces organic molecules that are oxidized during cellular respiration to produce ATP

Photosynthesis: 6 molecules of CO2 + 6 molecules of H2O in the presence of light gives C6H12O6+ O2

Cellular respiration: C6H12O6+ 6 O2 gives 6 CO2+6 H2O

option: a

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