Ribosome {Ans: a small structure that assembles proteins found in both prokaryotic and eukaryotic cells}In which part of the cell is most of the ATP produced during cellular respiration? {Ans: mitochondria}cell membrane {Ans: The structure that surrounds all cells and regulates what come in and goes out}capsule {Ans: a slimy layer surrounding some bacteria that protects them from harmful substances and prevents their drying out}concentration gradient {Ans: The difference in the number of a certain type of molecule on each side of a membrane}selectively permeable {Ans: allowing some substances to pass through while keeping others out}