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BIOL 103 PATHWAYS AND REGULATIONS QUIZ

BIOL 103 PATHWAYS AND REGULATIONS QUIZ

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Pathways and Regulations Quiz
Question 1
Points: 10 out of 10
How does the body react to rapid weight loss?
Hunger increases and the metabolic rate goes down.
Hunger increases and the metabolic rate goes up.
Hunger decreases and the metabolic rate goes up.
Question 2
Points: 10 out of 10
What would be a typical regulatory system in a metabolic pathway?
The pathway’s product slows it down, so that the product is maintained at a constant level in the cell or organism.
The pathway’s product makes it go faster, so that more and more of the product builds up in the cell or body.
Question 3
Points: 10 out of 10
What is the connection between a person’s genes and his or her metabolism?
enzymes encoded by genes regulate metabolic pathways
structural proteins encoded by genes regulate metabolic pathways
DNA regulates metabolic pathways directly
Question 4
Points: 10 out of 10
Which of the following regulatory mechanisms is described incorrectly?
enzyme modification: enzyme gains or loses a functional group
competitive inhibitor: binds to the active site of the enzyme
substrate availability: more substrate increases enzyme activity (until it reaches saturation)
All are correct
feedback inhibition: product inhibits its own production
Question 5
Points: 10 out of 10
Energy is stored in different forms in the body. ATP is very unstable and is put to use very quickly in cells. Other storage molecules last longer. Which gives the major energy stores of the body in the correct order?
Short term: glucose. Medium term: glycogen. Long term: fat.
Short term: fat. Medium term: glycogen. Long term: glucose.
Short term: glycogen. Medium term: glucose. Long term: fat.
Question 6
Points: 10 out of 10
The fundamental difference between competitive and non-competitive inhibition is: _________________________
the manner of binding of the inhibitor to the enzyme.
the size of the active site of the enzyme.
the manner of binding of the substrate to the enzyme.
Question 7
Points: 10 out of 10
Cells or organisms tend to maintain steady internal conditions. What is the name for this property and ability of life?
Homeostasis
Reproduction
Metabolism
Adaptation
Question 8
Points: 0 out of 10
Which of the following are characteristics of metabolic pathways?
 
Contain many intermediates.
Are regulated.
Each pathway has a key enzyme that catalyzes most of the reactions
Are specific for each organism
Are often reversible
Question 9
Points: 10 out of 10
Which best describes body weight regulation in a normal human who is living in a modern society?
Our normal responses of appetite and metabolism tend to cause weight gain in modern societies, and they also tend to make weight loss difficult.
Our normal responses of appetite and metabolism ensure that adults remain at a given normal body weight. Any change from this normal weight sets in motion responses that return the body to its normal weight.
Question 10
Points: 10 out of 10
Which of the graphs in the figure best illustrates the activity of an enzyme as substrate concentration increases from 0 to the saturation point of the enzyme?
 
Pathways and Regulations Quiz
Question 1
Points: 10 out of 10
Cells or organisms tend to maintain steady internal conditions. What is the name for this property and ability of life?
Reproduction
Homeostasis
Metabolism
Adaptation


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