Q,1). During photophosphorylation, each photon excites …..electron/s?
(a) 1
(b) 2
(c) 3
(d) 4
Explanation: A photon is absorbed by chlorophyll pigments surrounding the reaction core center of Photosystem II. The light excites an electron in the pigment P680 at the core of Photosystem II, which is transferred to the primary electron acceptor, pheophytin, leaving behind high-energy P680+.
Q,2). Light reaction results in the form of;
(a) O2
(b) NADPH
(c) ATP
(d) all
Explanation: End products of the Light reaction are ATP, NADPH and Oxygen. Oxygen escapes into the atmosphere. ATP & NADPH which is produced is called Assimilatory Power and this will be used in dark reactions of Photosynthesis.
Q,3). During light phase pf photosynthesis __ is oxidized & __ is reduced?
(a) CO2 &water
(b) Water and CO2
(c) Water &NADP
(d) NADPH2& CO2
Explanation: Water is oxidized in photosynthesis, which means it loses electrons, and carbon dioxide is reduced, meaning it gains electrons.
Q,4). Which pathway for aerobic cellular respiration is located in the cytoplasm of the eukaryotic cell?
(a) glycolysis
(b) krebs cycle
(c) pyruvic acid and oxidation
(d) electron transport chain
Explanation: Nearly all living organisms carry out glycolysis as part of their metabolism. The process does not use oxygen and is therefore anaerobic (processes that use oxygen are called aerobic). Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells.
Q,5). Coenzyme that is used in cellular respiration!
(a) NADP+
(b) NAD+
(c) Niacin
(d) Alcohal dehydrogenase
Explanation: A coenzyme present in every living cell is NAD+. It participates in electron transport reactions in cell metabolism processes like glycolysis. Another essential coenzyme is FAD which also contributes to the electron transport process.
Q,6). The end product of glycolysis is:
(a) pyruvate
(b) lactate
(c) NADH
(d) Both A and B
Explanation: The final product of glycolysis is pyruvate in aerobic settings and lactate in anaerobic conditions. Pyruvate enters the Krebs cycle for further energy production.
Q,7). When yeast ferment glucose ,the product obtained are:
(a) ethanol and water
(b) ethanol and CO2
(c) water and lactic acid
(d) lactic acid and co2
Explanation: The fermentation in yeast under anaerobic conditions produces ethanol and CO2. Pyruvic acid, the end product of glycolysis gets converted into alcohol and CO2. It is first converted into acetaldehyde and then to ethanol.
Q,8). Out of 40 ATP MOLECULES produced per glucose,2Atp molecules are formed during?
(a) glycolysis
(b) pyruvic acid & oxidation
(c) krebs cycle
(d) electron transport chain
Q,9). FADH2 is oxidized in:
(a) pyruvate decarboxylation
(b) respiratory chain
(c) glycolysis
(d) Krebs cycle
Feedback: NADH and FADH2 are oxidized during the electron transport chain. NADH and FADH2 are electron carriers. The respiratory chain, otherwise known as the electron transport chain, resides in the mitochondria
Q,10). Product of phosphofructokinase is?
(a) glucose 6_ phosphate
(b) Acetyl_cOA
(c) fructose 1,6_ bisphosphate
Q,11). which color is absorbed by carotenoids and reflected by Chlorophyll ?
(a) blue
(b) green
(c) violet
(d) red