Ethylene, the “ripening hormone,” is a gas plants use to accelerate fruit ripening, leaf senescence, and flower petal abscission. It acts as a signal, triggering programmed cell death and promoting processes that prepare fruit for dispersal. This is an MCQ on Ethylene Plant Hormone. You may also like: $. Plant Hormones […]
Cytokinin are like cellular cheerleaders in plants. They promote cell division, shoot growth, and delay aging, keeping leaves green and buds ready to sprout into new branches. This is an MCQ on Cytokinin (Physiological Effects of Cytokinins in Plants). You may also like: $. Plant Growth Regulators MCQ $. Auxins: […]
Auxins are plant growth regulators that act like tiny conductors. They control cell elongation, root formation, and even tell plants which way to grow by influencing their response to light and gravity. This is an MCQ on Auxin Hormone – Structure, Functions and Physiological Effects. You may also like: $. Plant […]
Abscisic acid (ABA) is a plant hormone nicknamed the “stress hormone.” It helps plants cope with drought, cold, and other threats by triggering responses like closing pores to conserve water and promoting seed dormancy. This is an MCQ on Abscisic Acid Structure and Functions. You may also like: $. Plant […]
Plant Hormone MCQ: Plant hormones, also known as phytohormones, are chemical substances that regulate various physiological processes in plants. They include auxins, gibberellins, cytokinins, ethylene, and abscisic acid. These hormones influence growth, development, flowering, fruiting, and responses to environmental stimuli. This is an MCQ on Plant Hormones. You may also […]
A proton gradient is a difference in proton concentration across a membrane, created by the electron transport chain. ATP synthesis occurs when protons flow back across the membrane through ATP synthase, using the energy from this gradient to convert ADP and inorganic phosphate into ATP. This article is on Proton […]
Chemiosmotic coupling is the mechanism by which ATP is synthesized in mitochondria and chloroplasts. It involves the movement of protons across a membrane, creating a proton gradient. The energy from this gradient drives ATP synthase to convert ADP and inorganic phosphate into ATP. This is an MCQ on Chemiosmotic Coupling […]
The Q cycle is a mechanism in the electron transport chain’s complex III (cytochrome bc1 complex) that transfers electrons from ubiquinol (QH2) to cytochrome c. It involves proton pumping from the mitochondrial matrix to the intermembrane space, contributing to the proton gradient for ATP synthesis. This is an MCQ on […]
Reduced coenzymes, such as NADH and FADH2, are molecules that carry electrons and hydrogen ions during cellular respiration. They are formed when NAD+ and FAD gain electrons (are reduced) during metabolic reactions like glycolysis and the Krebs cycle, facilitating ATP production in the electron transport chain. This is an MCQ […]