Question

question 13
1 pts
ab + cd → ad + cb is an example of a(n) ____ reaction.
synthesis
exchange
decomposition
reversible
question 14
1 pts
when atoms combine, they may gain, lose, or share:
electrons.
protons.
neutrons.
nuclei.
question 15
1 pts
the study of metabolism includes examination of:
catabolism.
anabolism.
atp requirements.
all of the above.

Explanation:

• For Question 13: In an exchange reaction, the components of the reactants swap places. Here, AB and CD react to form AD and CB, which is characteristic of an exchange reaction.
• For Question 14: When atoms combine to form chemical bonds, they gain, lose, or share electrons to achieve a stable electron - configuration.
• For Question 15: Metabolism encompasses catabolism (breaking down of substances), anabolism (building up of substances), and energy - related aspects such as ATP requirements.

Answer:

Question 13: B. exchange
Question 14: A. electrons
Question 15: D. all of the above