Bisc 160 Test 2 Jones || 100% Verified Solutions.
Based upon the first law of thermodynamics, which statement cannot be true? correct answers
Plants make their energy
What is the change in free energy of a system at chemical equilibrium? correct answers No net
change
In the citric acid cycle, electrons are transferred correct answers to NAD+
Most signal molecules correct answers bind to specific sites on receptor proteins in a membrane
When a molecule of NAD+ gains a hydrogen atom (not a hydrogen ion) the molecule becomes
correct answers reduced
In an exergonic reaction, what is the relationship between the amount of free energy in the
reactants and the amount of free energy in the products? correct answers The reactants have more
free energy.
Water passes quickly through plasma membranes because correct answers it moves through
aquaporins in the membrane.
In the experiment used to identify the source of oxygen lost from photosynthesis, researchers
correct answers used an isotope of carbon in CO2
Reactants capable of interacting to form products in a chemical reaction must first overcome a
thermodynamic barrier known as the reaction's correct answers activation energy
Which of the following steps leads to the complete oxidation of the carbon in glucose? correct
answers (B and C only) pyruvate oxidation; citric acid cycle
, In the energy-harvesting reactions of glycolysis, kinases correct answers attach phosphate to
ADP
A chemical reaction that has a positive △G is correctly described as correct answers endergonic.
Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar
stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the
celery stalks are correct answers hypertonic to the fresh water but hypotonic to the salt solution
In chloroplasts, chemiosmosis moves protons from correct answers the thylakoid lumen to the
stroma
What effect do enzymes have on the △G of a chemical reaction? correct answers Enzymes have
no effect on △G
In chemiosmotic phosphorylation, what is the most direct source of energy that is used to convert
ADP + Pi to ATP? correct answers energy released from movement of protons through ATP
synthase
Which of the following statements best describes the relationship between photosynthesis and
respiration? correct answers Photosynthesis stores energy in complex organic molecules, while
respiration releases it.
In noncyclic electron transport, which molecule is oxidized? correct answers H2O
Free-energy describes correct answers the energy available to do work
Zinc, an essential trace element for most organisms, is present in the active site of the enzyme
carboxypeptidase. The zinc most likely functions as a(n) correct answers coenzyme derived from
a vitamin.
Based upon the first law of thermodynamics, which statement cannot be true? correct answers
Plants make their energy
What is the change in free energy of a system at chemical equilibrium? correct answers No net
change
In the citric acid cycle, electrons are transferred correct answers to NAD+
Most signal molecules correct answers bind to specific sites on receptor proteins in a membrane
When a molecule of NAD+ gains a hydrogen atom (not a hydrogen ion) the molecule becomes
correct answers reduced
In an exergonic reaction, what is the relationship between the amount of free energy in the
reactants and the amount of free energy in the products? correct answers The reactants have more
free energy.
Water passes quickly through plasma membranes because correct answers it moves through
aquaporins in the membrane.
In the experiment used to identify the source of oxygen lost from photosynthesis, researchers
correct answers used an isotope of carbon in CO2
Reactants capable of interacting to form products in a chemical reaction must first overcome a
thermodynamic barrier known as the reaction's correct answers activation energy
Which of the following steps leads to the complete oxidation of the carbon in glucose? correct
answers (B and C only) pyruvate oxidation; citric acid cycle
, In the energy-harvesting reactions of glycolysis, kinases correct answers attach phosphate to
ADP
A chemical reaction that has a positive △G is correctly described as correct answers endergonic.
Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar
stalks left in a salt solution become limp and soft. From this we can deduce that the cells of the
celery stalks are correct answers hypertonic to the fresh water but hypotonic to the salt solution
In chloroplasts, chemiosmosis moves protons from correct answers the thylakoid lumen to the
stroma
What effect do enzymes have on the △G of a chemical reaction? correct answers Enzymes have
no effect on △G
In chemiosmotic phosphorylation, what is the most direct source of energy that is used to convert
ADP + Pi to ATP? correct answers energy released from movement of protons through ATP
synthase
Which of the following statements best describes the relationship between photosynthesis and
respiration? correct answers Photosynthesis stores energy in complex organic molecules, while
respiration releases it.
In noncyclic electron transport, which molecule is oxidized? correct answers H2O
Free-energy describes correct answers the energy available to do work
Zinc, an essential trace element for most organisms, is present in the active site of the enzyme
carboxypeptidase. The zinc most likely functions as a(n) correct answers coenzyme derived from
a vitamin.
