Chapter 6, 7, & 31 Quiz
14 December 2020
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