56 public questions tagged with this topic.
In glycolysis, substrate-level phosphorylation directly generates 4 ATP molecules. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
ATP is a nucleotide, not a protein made of amino acids. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
ATP is a nucleotide, not a protein, and does not act as an enzyme. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.
ATP stores energy in its high-energy phosphate bonds, not peptide bonds. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
ATP is the main energy carrier in lls. It is not an enzyme, does not contain peptide bonds, and can be regenerated. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
ATP (Adenosine Triphosphate) is the primary energy currency of the ll. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -
ATP provides energy through the hydrolysis of phosphate bonds, not peptide bonds. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
ATP is produced in both the cytoplasm (glycolysis) and mitochondria (aerobic respiration). This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.
ATP provides the energy required for the movement of myosin heads during muscle contraction. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.
Protons move through ATP synthase from the lumen to the stroma, generating ATP through chemiosmosis. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -
Membrane transport classification depends on thermodynamics and mechanism. Simple diffusion of lipophilic gases O2, CO2, steroids occurs directly through hydrocarbon core partitioning driven solely by concentration gradient without protein. Facilitated diffusion via channels like aquaporins and carriers like GLUT1 enhances polar solute permeation down gradient, increasing rate and specificity, still entropy-driven, saturable, no ATP hydrolysis. Osmosis is water movement across semipermeable membrane toward solute, also passive. Active transport moves substrates against electrochemical potential requiring energy coupling. Primary active transport directly hydrolyzes ATP by P-type ATPases Na+/K+ ATPase with phosphorylation intermediate pumping 3 Na+ outward and 2 K+ inward maintaining resting potential -70 mV, SERCA pumping Ca2+ into sarcoplasmic reticulum, V-type V-ATPase acidifying lysosomes. Secondary active transport uses sodium gradient energy to drive glucose uptake SGLT1 symport or Ca2+/Na+ exchange. ABC transporters also primary. Consequently active transport uniquely requires ATP or preexisting ion gradient powered originally by ATP, distinguishing it from passive modalities essential for nerve impulse and volume regulation.
Ref: Alberts et al., Molecular Biology of the Cell, 7th ed., Chapter 11: Active Transport Requires ATP.
Membrane transport energetics divide conceptually into active requiring cellular energy input and passive driven solely by existing electrochemical gradients toward equilibrium. Primary active transport directly couples exergonic ATP hydrolysis to ion movement against gradient: Na+/K+ ATPase phosphorylates aspartate forming E1P E2P cycle extruding three sodium importing two potassium, V-type proton pumps rotate c-ring acidifying lysosomes using ATP, ABC transporters dimerize nucleotide binding domains consuming ATP to expel drugs and lipids. Secondary active cotransporters such as SGLT1 sodium glucose symporter and NCX sodium calcium exchanger use previously established sodium gradient to accumulate glucose or extrude calcium without directly hydrolyzing ATP. Vesicular routes endocytosis and exocytosis require ATP for actin polymerization, dynamin GTPase activity, clathrin uncoating by Hsc70 and NSF mediated SNARE disassembly. In contrast facilitated diffusion includes GLUT uniporters operating via alternating access rocker switch and channel proteins like voltage gated ion channels and aquaporins providing continuous aqueous pathway. Both show saturation kinetics Michaelis-Menten like but operate down gradient, no phosphorylation intermediate or nucleotide consumption, powered solely by concentration difference. Therefore facilitated diffusion distinguishes itself by independence from ATP hydrolysis and uphill energy coupling.
Ref: Lodish et al., Molecular Cell Biology, Chapter 11: Classification of Transport - ATP Requirement.
