Question

Why do organisms need to obtain energy via cellular respiration?
Options:
To grow and reproduce
To perform glycolysis
To break down ATP
To photosynthesis

Answer 1

Organisms need to obtain energy via cellular respiration primarily for two reasons:

1) To grow and reproduce: Energy is required for the growth and development of organisms. It is necessary for the synthesis of new molecules, production of new cells, and overall growth of the organism. Without energy, organisms would not be able to grow and reproduce.

2) To break down ATP: Adenosine triphosphate (ATP) is the energy currency of cells. It provides energy for various cellular processes, such as muscle contraction, active transport, and synthesis of molecules. During cellular respiration, energy-rich molecules, such as glucose, are broken down and converted into ATP, which can be utilized by cells for their energy needs. Without cellular respiration, organisms would not be able to produce ATP and perform crucial tasks necessary for their survival.

Performing glycolysis and photosynthesis are not reasons why organisms need to obtain energy via cellular respiration. Glycolysis is the initial step of cellular respiration and is one of the ways by which organisms produce ATP. Photosynthesis, on the other hand, is the process by which autotrophic organisms convert light energy into chemical energy (glucose) and is not directly related to cellular respiration.