Coffee is acidic, with a pH of 5.
Answer: Alveoli
Explanation: Alveoli of lungs are surrounded by extensive blood capillaries. The partial pressure of oxygen in the alveoli is higher than the blood entering the pulmonary capillaries, hence oxygen moves into the blood. Carbon dioxide in the lungs simultaneously diffuse out of the blood into the alveolar space.
Because both prokaryotic and eukaryotic cells have chromosomes (prokaryotes, and more specifically, bacteria, generally have just one chromosome, but there are some bacteria as well as archaea—which are also prokaryotes—that have multiple chromosomes).
They use energy from the breakdown of a molecule called ATP. ATP is often called the energy currency of our body as it is used all around in the human body for different processes that need energy - so not just active transport of proteins. ATP gets broken down into ADP and an extra group of P (phosphates).