Chapter 6, 7, & 31 Quiz

question

Which of the following statements concerning enzymes is false?
answer

They increase the activation energy required for chemical reactions to proceed.
question

When we metabolize our food, we produce heat that helps to keep us warm. Which of the following best describes why?
answer

When we break down our food, the reactions are not 100 percent efficient; therefore, energy is lost as heat.
question

Which of the following has the most entropy?
answer

steam
question

Which of the following is true of allosteric enzymes?
answer

Their activity can be reduced when the product binds the enzyme.
question

The term aerobic means:
answer

oxygen-dependent
question

During cellular respiration, what molecule collects the majority of the electrons from the food that we eat?
answer

NAD+
question

Cells capture the energy from food and store it in the form of:
answer

ATP
question

Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?
answer

All organisms use glycolysis; not all use the Krebs cycle and the electron transport chain.
question

What is unusual about soy protein as opposed to other plant protein sources?
answer

Soy protein has all essential amino acids in the proper proportions.
question

Which of the following is a complex carbohydrate that cannot be digested?
answer

fibers
question

In a traditional food pyramid, which type of food would be closest to the base?
answer

whole grain foods
question

Which of the following is a trace mineral?
answer

iodine
question

Enzymes themselves are altered in the process of catalyzing chemical transformations.
answer

False
question

Allosteric regulation depends on inhibitors binding to the active site of enzymes.
answer

False
question

Links the study of energy to life
answer

bioenergetics
question

The study of energy
answer

thermodynamics
question

The breakdown of large molecules into smaller ones, with the release of energy
answer

exergonic reaction
question

The building of larger molecules, requiring energy
answer

endergonic reaction
question

Using the energy from the breakdown of molecules to fuel the construction of new molecules
answer

coupled reaction
question

A source of chemical energy for metabolic processes
answer

ATP
question

The energy required to initiate a chemical reaction
answer

activation energy

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