Please help! Not sure about these questions..thanks
QUESTION 1
An example of an endergonic reaction is
A.
Polymerizing a protein from amino acids.
B.
Breaking a protein down into amino acids.
C.
Breaking down ATP into ADP and P.
D.
Breaking down glucose (using oxygen) to make CO2 and H2O.
QUESTION 2
When ATP breaks down to supply energy for cellular reactions, it often transfers its 3rd phosphate to another molecule. This is called ______, and makes the other molecule _______ reactive.
A.
catalysis . . . more
B.
phosphorylation . . . more
C.
phosphorylation . . . less
D.
polymerization . . . less
QUESTION 3
Which is true of enzymes?
A.
They are highly specific in the reactions they catalyze.
B.
Chemically, most are carbohydrates.
C.
They accelerate reactions by adding energy.
D.
They break down and are used up as they catalyze reactions.
QUESTION 4
What is peristalsis?
A.
Rings of muscle that can contract to close off the stomach at each end.
B.
A gland that secretes saliva.
C.
Coordinated muscle contractions that move the contents of the GI tract.
D.
A stomach enzyme that breaks down proteins.
QUESTION 5
Which is not a component of gastric juice?
A.
H2O
B.
acid
C.
pepsin
D.
amylase
QUESTION 6
What does the enzyme pepsin do?
A.
Completely breaks down proteins into individual amino acids.
B.
Completely breaks down carbohydrates into monosaccharides.
C.
Partially breaks down proteins into smaller polypeptides.
D.
Partially breaks down fats into fatty acids.
Please help! Not sure about these questions..thanks
QUESTION 1
An example of an endergonic reaction is
A. | Polymerizing a protein from amino acids. | |
B. | Breaking a protein down into amino acids. | |
C. | Breaking down ATP into ADP and P. | |
D. | Breaking down glucose (using oxygen) to make CO2 and H2O. |
QUESTION 2
When ATP breaks down to supply energy for cellular reactions, it often transfers its 3rd phosphate to another molecule. This is called ______, and makes the other molecule _______ reactive.
A. | catalysis . . . more | |
B. | phosphorylation . . . more | |
C. | phosphorylation . . . less | |
D. | polymerization . . . less |
QUESTION 3
Which is true of enzymes?
A. | They are highly specific in the reactions they catalyze. | |
B. | Chemically, most are carbohydrates. | |
C. | They accelerate reactions by adding energy. | |
D. | They break down and are used up as they catalyze reactions. |
QUESTION 4
What is peristalsis?
A. | Rings of muscle that can contract to close off the stomach at each end. | |
B. | A gland that secretes saliva. | |
C. | Coordinated muscle contractions that move the contents of the GI tract. | |
D. | A stomach enzyme that breaks down proteins. |
QUESTION 5
Which is not a component of gastric juice?
A. | H2O | |
B. | acid | |
C. | pepsin | |
D. | amylase | |
QUESTION 6
What does the enzyme pepsin do?
A. | Completely breaks down proteins into individual amino acids. | |
B. | Completely breaks down carbohydrates into monosaccharides. | |
C. | Partially breaks down proteins into smaller polypeptides. | |
D. | Partially breaks down fats into fatty acids. |