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Exam 3

Biology - final - Exam 3 questions

QuestionAnswer
What is the definition of energy? the capacity to perform work
According to the ______, energy cannot be created or destroyed. First law of thermodynamics
Chemical reactions that breakdown large molecules into smaller ones and generate energy for organisms to use are: catabolic reactions
Breakdown of glucose molecules provide energy to power a cheetah running to catch its prey. In this example, the cheetah is changing: chemical energy into kinetic energy
What is most similar to NADH in structure? a nucleotide
Synthesis of a protein from amino acids is an example of a reaction from glycolysis
What is true for all endergonic reactions? the products have more total energy than the reactants
The enzymes used in every chemical reaction in living organisms are mostly what type of macromolecule? proteins
A chemical reaction that has a negative delta G is correctly described as: exergonic
What is true about ATP? It releases free energy the cell can use during hydrolysis
Energy transformation re never completely efficient, and with every energy transformation organism will lose some energy in the form of what? Heat loss to the environment
The region of an enzyme to which a substrate binds is called the: Active site
What is likely to lead to a DECREASE in the concentration of ATP in a cell? an increase in a cell's anabolic activity
What is the sequence of stages in cellular respiration? glycolysis, citric acid cycle, electron transport
During fermentation: Pyruvate is a reactant and NAD+ is a product
What are the net products of glycolysis? 2 ATP, 2 NADH, and 2 pyruvate
What metabolic pathway occurs in the mitochondrial matrix the citric acid cycle
What must pyruvate (pyruvic acid) be converted to before it can enter the citric acid cycle? acetyl-CoA
What results in an accumulation of positively charged hydrogen ions on one side of a membrane? electron transport chain
Where in the cell does glycolysis occur? cytoplasm
Created by: josie_d
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