Why do the cells in all living things need energy?
A. to fuel their chemical reactions
B. to help them decompose
C. to communicate with other cells
D. so they can block sunlight
Answer (3)
The correct option is A. A lot of biochemical reactions occur per minute inside living cells and these reactions have to be sustained because the survival of living cells depend on them. For these reactions to proceed, energy is needed. This energy is usually obtained from the food which a living organism consumed. The mitochondria, which is the power house of the cell, is the one which convert the energy to the ATP form, which is usable by the cells.
Cells in** living organisms** need energy to carry out various processes such as metabolizing nutrients, building and breaking down molecules, signaling other cells, moving materials within the cell, and maintaining their health. This energy comes from the chemical energy in food, which is transformed into usable energy within cells. The ATP molecules produced through cellular chemical reactions provide readily accessible energy for cellular activities. ;
Cells in all living organisms need energy primarily to fuel their chemical reactions, maintain homeostasis, transport molecules, grow, repair, and communicate. This energy is mainly derived from food, converted into ATP within the cells. Therefore, the correct answer to the question is A: to fuel their chemical reactions.
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