Question

Why do organisms need to obtain energy via cellular respiration?

to perform glycolysis

to photosynthesize

to break down ATP

to grow and reproduce

Answer 1

chose one

Answer 2

Organisms need to obtain energy via cellular respiration for multiple reasons:

1. To perform glycolysis: Glycolysis is the first step in cellular respiration, where glucose is broken down into pyruvate to release a small amount of ATP. This initial step is essential to initiate the process of extracting energy from glucose.

2. To break down ATP: Adenosine triphosphate (ATP) is the main energy currency in cells. Through cellular respiration, organisms can break down ATP into adenosine diphosphate (ADP) and use the released energy for various cellular processes such as muscle contractions, synthesis of molecules, active transport, and other energy-demanding activities.

3. To grow and reproduce: Cellular respiration provides the necessary energy for growth and reproductive processes in organisms. From obtaining energy for cell division and growth during development to supporting reproductive functions such as gamete production and fertilization, energy obtained through cellular respiration is vital for these life processes.

4. To generate energy in the absence of photosynthesis: Although some organisms can generate energy through photosynthesis, not all organisms possess photosynthetic capabilities. Organisms without access to sunlight or in dark environments rely entirely on cellular respiration to obtain energy from organic molecules for their survival, growth, and reproduction.

Answer 3

Organisms need to obtain energy via cellular respiration because it is the process by which they convert the energy stored in food molecules into a usable form known as ATP (adenosine triphosphate). ATP is the "energy currency" of the cell and is required for various cellular activities, including growth, reproduction, movement, and maintaining basic cellular functions.