Question

what is the sum of all the chemical reactions in a cell called?
a \treproduction
b \tdevelopment
c \thomeostasis
d \tmetabolism

Explanation:

• Option a: Reproduction is the process of producing offspring, not related to chemical reactions in a cell.
• Option b: Development refers to the growth and change of an organism over time, not the sum of cell - level chemical reactions.
• Option c: Homeostasis is the maintenance of a stable internal environment, not about chemical reactions in a cell.
• Option d: Metabolism is defined as the sum of all chemical reactions (both catabolic and anabolic) that occur within a cell or an organism.

Answer:

d. metabolism