Biology CLEP Prep Practice Exam

What is the role of ATP in the cell?

1. Storage of energy

2. Catalyzing chemical reactions

3. Transmission of genetic information

4. Transporting proteins

The correct answer is: Storage of energy

ATP (adenosine triphosphate) is a molecule that plays a crucial role in the energy metabolism of cells. It is often referred to as the "energy currency" of the cell, as it is the primary source of energy for most cellular processes. Therefore, option A, which states that ATP functions as a storage of energy, is correct. Option B, which suggests that ATP catalyzes chemical reactions, is incorrect as enzymes are the biological molecules that catalyze chemical reactions in cells. Similarly, option C, which implies that ATP is involved in the transmission of genetic information, is also incorrect as DNA and RNA are the molecules responsible for transmitting genetic information in cells. Option D, which proposes that ATP transports proteins, is also incorrect as proteins are transported in the cell by other mechanisms, such as cellular transport processes and vesicular transport. Therefore, option A is the only