Friday, 11 December 2020

1st Year Biology Chapter 11 Bioenergetics MCQs

1st Year Biology Chapter 11 Bioenergentics MCQs

If you are a student of 11th class biology and looking for the mcqs of chapter 11 then here we have shared the 1st Year Biology Chapter 11 Bioenergetics MCQs.


• *1 photon of light excites one electron. 

• *The oxygen we breathe is the product of PS2 

• *Process of generation of ATP both in chloroplast and mitochondria is chemiosmosis. 

• *There is net gain of 19AtP from one molecule of glycerol 

• *In krebs cycle for every one molecule of glucose broken down two Acetyl-CoA molecules are formed 

• *In glycolysis two molecules of NADPH and two molecules of ATP are produced 

• *Inability of oxidative metabolism of the reduced products i.e lactic acid causes a condition called oxygen debt. 

its during extreme fatigue conditions. this debt ends when the metabolism that produces reduced products i.e 

lactic acid slows down. (courtesy by Book glossary given at the end) 

• Cytochrome = any of the iron containing protein that acts as a carries in ETC.so according to this defination

Ferridoxin (iron containing protein) can also be called Cytochrome.(courtesy by book glossary given at the end) 

• *Oxidation of one molecule of glucose gives = 36 ATPin which 34 Atp are produced in ETC while 2 in 

• Cytoplasm. 

• *Glycolysis = 2atp used , 4made, 2 net gain*krebs cycle = 2 atp made 

• ETC = 34 atp made 

• *Total in aerobic respiration = 36/38 agr Q men dono options hon then 36 ko prefer krna hy. 

• *Total in cellular respiration = 38/40 Agr Q men dono options hon then 38 ko prefer krna hy. 

• *****Glycolysis**** 

• 2NaDH2 or FADH2 are formed.2Atps are realeased. 

• ***Formtion of Acetyl CoA.*** 

• 2NADH2 or FADH2 are formed.No atp is released. 

• ***Krebs cycle*** 

• 6NADH2+2FADH2and 2atps are released 

• ***Electron transport chain*** 

• Total NADH2 = 10 (Each NADH2 molecule gives 3 atps)Total FADH2 = 2 (Each FADH2 gives 2 Atp)so no of atps 

30+4 = 34 

• ***Total 38 possible atp molecules are formed during breakdown of one glucose molecule. But practically 36 

molecules are formed. The glycolysis produces NADH2 in cytosol. 2 atp molecules are used for bringing these 

NADH2 to mitochondria. So 38-2 = 36Atp 

• Copied from Sir Asad's post. 

• Atp---> Adp + pi= 7.3kcal or 31kj 

• Endergonic= energy gaining 

• Exergonic= energy releasing 

• Photosynthesis= anabolic 

• Respiration= catabolic 

• Carotene orange 

• Phaelophytin grey 

• Xanthophyll yellow 

• Chlorophyll a blue green 

• B yellow green 

• Chl a C55H72O5N4Mg

 Chl b C55H70O6N4Mg 

• Carotene absorbs green blue violet wavelength and reflects red yellow orange Light reac thylakoid membrane 

• Light independent reac stroma 

• Ps1 electron acceptor ferredoxin and electron donor plastocyanin 

• Ps2 electron accecptor phaeophytin and intermediate donor water splitting complex 

• Ps 1 and Atp synthase in non appresssed 

• Ps 2 in appressed alongwith lhc 2 (light harvesting complex) 

• Light reaction starts from ps2 

• Non cyclic ATP and Nadh2 both produced 

• Cyclic only Atp 

• Cyclic only involves Ps1 

• Dark reaction calvin benson cycle C3 cycle 

• 13 reactions 11 enzymes 

• Regeneration of RuBP involves enzyme 5-11 

• C4- sugar cane corn grass family 

• Light reaction cycles req for production of glucose in dark cycle 

• 6 light reactions 

• Cam - cacti pineapples 

• Oxidation of glucose= 673Kcal or 2823kj 

• Fermentation louis pasteur 

• Net gain of glycolysis 2Atp and 2nadh 

• Flavour of pickle- lactic and acetic acid 

• Krebs cycle citric acid cycle tricarboxylic acid cycle 

• Glycolysis occurs in cytoplasm 

• Krebs occur in mitochondria 

• And overall net gain including glycolysis and etc 36 atp (check) 

• Net gain of kreb cycle 30 atp 

• Sun ----> producers 

• 0.2% 

• Producers---> primary consumers---> sec consumers---> ter consumers 

• 5-20% 

• Energy coming from sun 

• 40% reflected back 

• 15% absorbed by ozone 

• 45% to earth out of which 2-3% is used by plants 

• Energy transfer^

• Plastocyanin- copper containing protein 

• Plastoquinone- associated with ferrous ion

• As e goes down the chain , energy is lost and used for synthesis of ATP 

• Ferredoxin- iron containing protein 

• The path of e through 2 photosystems during non cyclic photophosporylation is known as Z-scheme 

• When Atp conc low- cyclic phosphorylation 

• In both cyclic and non cyclic- production of Atp- chemiosmosis 

• Calvin- nobel prize 1961 

• Rubisco- most abundant protein in chloroplast and most abundant protein on Earth 

• ""Cellulose- most abundant carbohydrate in nature- HEC PHASE 2 QUES"" 

• Starch - second most abundant carb in nature 

• G3P- formed in both cellular respiration and photosynthesis(dark reaction) 

• C3H4O3- Pyruvic acid 

• C3H6O3- Lactic acid 

• Glycolysis- splitting of sugar 

• The second and third phosphate are high energy bonds in ATP 

• Oxygen- not essential for glycolysis 

• The oxidation of phospho-glyceraldehyde (PGAL) is energy yielding process

• Acetyl CoA- active acetate 

• Acetyl- 2C 

• Citrate- 6C 

• Oxaloacetate- 4C 

• Fumerate- 4C 

• Alpha ketogluterate- 5C 

• Succinate- 4C 

• Malate- 4C 

• FAD(coenzyme)- oxidizing agent which is reduced to FADH2 

• Etc-

• Co enzyme Q--> Cyt a --> cyt c--> cyt a--> cyt a3 

• Nadh is oxidized by coenzyme Q 

• Oxygen is the final acceptor of electrons in Etc and production of water takes place. 

• Bioenergetics- study of quantitative study of energy relationships and conversions in biological system 

• Atp- chemical link between catabolism and anabolism 

• Photosynthesis- energy capturing 

• Respiration- energy releasing 

• Solar energy --> food energy--> chemical energy

• Purple sulphur bacteria- bacterio-chlorophyll and carotenoids 

• Green sulphur- chlorobium chlorophyll

• NPK- 5,10,5 

• Nitrogen def 

• Chlorosis 

• Development of anthocyanin pigments 

• Early senescence 

• Phosphorous 

• Helps in translocation of carbs 

• Fruit ripening 

• Def 

• Necrotic patches 

• Cambial activity is checked 

• Potassium 

• Stomatal opening 

• Found in highest conc in meristematic cells 

• Activator for enzymes

• Def 

• Colour of leaves dull or bluish green 

• Irregular chlorosis 

• Magnesium 

• Phosphorous carrier in plant 

• Synthesis of fats and metabolism of carbs and phosphorous 

• Def 

• Chlorosis 

• Necrotic spots

• Silica-- grass 

• Cobalt- nitrogen fixing bacteria 

• Nickle- soyabean 

• Sodium- osmotic and ionic balance


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