5 public questions tagged with this topic.
Gas exchange in the alveoli occurs due to the partial pressure gradient of oxygen and carbon dioxide.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Neutral solutes may cross the plasma membrane by simple diffusion along their concentration gradient, from higher to lower concentration. This is a form of passive transport and does not require energy.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Prokaryotic Cell - Structure and Components
Osmosis is the movement of water by diffusion across the plasma membrane. It is a passive process and does not require the expenditure of cellular energy.
Ref: NCERT Class 11 Biology Chapter 8: Cell: The Unit of Life Cell Theory and Overview of Cell
Gap junctions, is consistent with established principles of cell signaling, receptor pharmacology and cellular regulation. Experimental measurements of binding parameters, genetic loss-of-function studies and pharmacological interventions all converge on the same interpretation. Related options address neighboring concepts but do not satisfy the precise criterion stated in the question.
Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)
That points to B: Diffusion. Compared with the other options, Diffusion is the one that correctly describes the BASICS of PLANT concept. The wrong ones are A) Active transport; C) Mass flow; D) Endocytosis. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
