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51 In glycolysis, what starts the process of glucose oxidation?

A: ADP

B: FADH₂

C: Hexokinase

D: NADPH

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52 Which of these is NOT a product of glycolysis?

A: NADH

B: FADH₂

C: Pyruvate

D: ATP

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53 In glycolysis, ATP molecules are produced by

A: Substrate-level phosphorylation

B: Photosynthesis

C: Cellular respiration

D: Photophosphorylation

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54 How many NADH are produced by glycolysis?

A: 3

B: 2

C: 4

D: 5

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55 Which of the following describes the process of glycolysis?

A: Converts glucose to pyruvate and CO₂

B: First stage of glucose oxidation

C: Occurs in mitochondria

D: Produces 30 ATP, NADH

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56 Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?

A: Molecules in chemical bonds that cells can use for work

B: Producing complex molecules from chemical building blocks

C: The breakdown of glucose to carbon dioxide and water

D: Breaking down ATP, so that ADP and P can be reused

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57 Gaseous hydrogen burns in the presence of oxygen to form water: 2H₂ + O₂ → 2H₂O + energy

A: Hydrogen, polar

B: Oxygen, polar

C: Oxygen, nonpolar

D: Hydrogen, nonpolar

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58 What kind of bond is formed when lithium and fluorine combine to form lithium fluoride?

A: Nonpolar covalent

B: Redox

C: Polar covalent

D: Ionic

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59 Which of the following statements is not true of most cellular redox reactions?

A: Changes in potential energy can be released as heat.

B: The reactant that is oxidized loses electrons.

C: A hydrogen atom is transferred to the atom that loses an electron.

D: The electron acceptor is reduced

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60 Which of the following statements is true of the bonds in a water molecule?

A: Oxygen acts as the electron acceptor and is oxidized.

B: Oxygen holds electrons more tightly, net charge is zero

C: Electron in each hydrogen transferred, net +1 charge

D: Equal sharing of electrons, net charge zero

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