Cellular Respiration Overview & Glycolysis

This quiz covers respiration basics, enzymes/activation energy, oxidation, and the full glycolytic pathway

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QUESTION OF
Views #: 3
Questions #: 12
Time: 10 minutes
Pass Score: 80.0%
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Naming the Energy-Releasing Process

1 pts
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Fats, proteins, and carbohydrates are reservoirs of energy that, through a series of chemical reactions, become available to the cells. What is this overall series of reactions called?

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Oxygen Requirement in Respiration

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True or False: Respiration always requires oxygen to occur.

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Where Most Respiratory Steps Occur

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In eukaryotic cells, all the respiratory steps except for glycolysis occur within the:

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Where Glycolysis Takes Place

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Glycolysis occurs in the:

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Splitting Glucose

1 pts

The series of controlled chemical reaction steps that break down glucose into pyruvate is called (1), a term that literally refers to the lysis, or splitting, of glucose.

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deamination
glycolysis
oxidation
hydrolysis
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The Glycolytic Pathway

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Glycolysis Pathway Simplified Schematic of Ecosystem Respiration Phase Glucose (6-Carbon) Investment: 1 ATP Glucose 6-phosphate Fructose 6-phosphate Investment: 2nd ATP Fructose 1,6-bisphosphate Splits into two 3-Carbon Sugar Pathways G3P / PGAL (3-Carbon) 1,3-Bisphosphoglycerate G3P / PGAL (3-Carbon) 1,3-Bisphosphoglycerate Produces NADH & ATP Produces NADH & ATP Generates 2 ATP Generates 2 ATP Pyruvate (3-Carbon) Pyruvate (3-Carbon)

Based on the diagram, how many 3-carbon pyruvate molecules are ultimately produced from one molecule of glucose during glycolysis?

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The Role of ATP in Starting Reactions

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Which molecule provides the activation energy needed to initiate the breakdown of glucose molecules?

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Enzymes and Activation Energy

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True or False: Enzymes increase the amount of activation energy required to start a chemical reaction.

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Defining Oxidation

1 pts

Chemically, (1) is defined as the loss of an electron, usually taking place through the addition of oxygen or the subtraction of hydrogen.

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hydrolysis
oxidation
reduction
fermentation
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Enzymes and Temperature

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Most human enzymes function best at which approximate temperature?

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Why Energy Is Released in Small Steps

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Why does the cell break down glucose through many small, controlled steps rather than releasing all the energy at once?

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Classify by Cellular Location

2 pts

Sort each process into the cellular compartment where it occurs

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0
sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC
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