Cell envelope, cell membrane, cell wall
- Movement and accumulation of ions across a membrane against their concentration gradient can be explained by Answer: 1. Active Transport Key idea: Movement of ions against their concentration gradient needs energy (ATP) and carrier proteins, and thi... 1
- Addition of more solutes in a given solution will : Answer: 3. lower its water potential Water potential of pure water is highest (zero). Adding solute lowers the free energy of water, so solu... 1
- Which of the following components provides sticky character to the bacterial cell ? Answer: 3. Glycocalyx The glycocalyx is the outer layer of the bacterial cell envelope, made of polysaccharide (and sometimes protein). It i... 1