Quiz: Chapter 2 - Bioenergetics

1 Photosynthesis is a --- process.

Endothermic Exothermic Both None

2 In photosynthesis, H₂O gets:

Oxidized Reduced Both None

3 Source of glucose in photosynthesis is:

H₂O CO₂ Chlorophyll All

4 Dark reaction takes place:

Day time Night time Both times None

5 Most stomata in leaves are present in:

Upper epidermis Lower epidermis Endodermis All

6 RuBP combines with O₂ when CO₂ falls below:

10ppm 30ppm 50ppm 70ppm

7 Carotenoids are:

Yellow, red, orange Red to yellow Yellow None

8 Beta-carotene is converted to vitamin:

A B C D

9 Chlorophyll in bacteria is:

a b d e

10 Deficiency of which element causes chlorosis?

K Mg Ca Cl

11 First electron acceptor in cyclic phosphorylation is:

Water NADP+ P700 O₂

12 Products of light-dependent reactions are:

ATP, RuBP ATP, O₂, NADPH GP, O₂ GP, NADPH

13 Splitting of water is called:

Lysis Photolysis Condensation Hydrolysis

14 Cyclic photophosphorylation involves:

PS I PS II Both None

15 Final electron acceptor in non-cyclic pathway is:

PQ PC NADP+ Fd

16 CO₂ acceptor in Calvin cycle is:

Rubisco RuP RuBP GAP

17 Calvin cycle occurs in:

Grana Stroma Thylakoid Matrix

18 Immediate product after CO₂ fixation is:

6C unstable 3-PGA G3P RuBP

19 End product of Calvin cycle is:

3-PGA G3P Glucose RuBP

20 ATP and NADPH are used in:

Reduction phase Fixation Regeneration All

21 Immediate energy source for cells is:

Lipids Carbohydrates ATP Proteins

22 Glycolysis breaks glucose into:

Glycerate Pyruvate Lactate Succinate

23 Glycolysis occurs in:

Mitochondria Cytoplasm Nucleus Golgi

24 Net ATP from glycolysis:

2 4 6 8

25 Pyruvate is converted to:

Acetyl CoA Citrate OAA Malate

26 Krebs cycle occurs in:

Cytoplasm Matrix Cristae RER

27 FADH₂ is produced when:

Succinate → Fumarate Malate → OAA Citrate → Isocitrate α-KG → Succinate

28 Final electron acceptor in ETC is:

H₂ Cytochrome c O₂ CO₂

29 ATP yield from 1 glucose (aerobic):

2 36 38 40

30 ETC carriers are located on:

Outer membrane Inner membrane Matrix Cristae

31 Anaerobic respiration in muscles produces:

Ethanol Lactate CO₂ Acetate

32 Yeast fermentation yields:

Ethanol + CO₂ Lactate O₂ Acetyl CoA

33 ATP from anaerobic respiration:

2 4 6 8

34 Baking uses:

Aerobic respiration Anaerobic respiration Glycolysis Krebs cycle

35 Muscle fatigue is due to:

Ethanol Lactate Pyruvate O₂

36 The terminal electron acceptor in electron transport chain is:

Hydrogen Cytochrome Iron Oxygen

37 Every molecule of NADH, fed into ETC produces:

2 ATP 4 ATP 3 ATP 6 ATP

38 Carriers of the respiratory chain are located on:

Matrix of mitochondria Inner membrane of mitochondria Outer membrane of mitochondria Cytoplasmic matrix

39 The process of ATP synthesis through a combination of electrochemical and osmotic events is known as:

Fermentation Glycolysis Oxidative phosphorylation Oxidation of pyruvate to acetyl CoA

40 What is the product formed at the end of the respiratory chain?

NADH Oxygen Water Carbon dioxide

41 Which form of anaerobic respiration occurs in muscle cells during extreme physical activities?

Alcoholic fermentation Glycolysis Lactic acid fermentation Pyruvic acid oxidation

42 End products of yeast fermentation are:

Ethyl alcohol and CO₂ Lactic acid Citric acid Methanol

43 The end product of anaerobic respiration in humans is:

Pyruvic acid Lactic acid Ethanol Glucose

44 Which is not a consequence of anaerobic respiration in human muscles?

Cramps High consumption of energy Pain Tiredness

45 The amount of energy converted into ATP during anaerobic respiration is:

2% 4% 10% 36%

46 Which scientist hypothesized that plants split water to release oxygen?

Van Neil Lysenko Calvin Krebs

47 The range of visible light is from:

300-650 nm 350-700 nm 380-750 nm 430-790 nm

48 Which color is maximally absorbed by chlorophyll?

Red Yellow Green Indigo

49 Graph showing effectiveness of absorbed light is called:

Absorption spectrum Light spectrum Action spectrum Dark spectrum

50 Magnesium is essential in plants for the formation of:

Proteins Lipids Chlorophyll Enzymes

51 In non-cyclic photophosphorylation, the deficit of ______ electrons occurs in chlorophyll.

1 2 3 4

52 Enzyme NADP reductase is responsible for:

Reducing NADP⁺ Oxidizing NADP⁺ Reducing Ferredoxin Reducing P700

53 PS II receives electrons from the splitting of:

Water Plastoquinone Plastocyanin Ferredoxin

54 Which does not occur during cyclic phosphorylation?

ATP synthesis Light absorption Photoexcitation of electrons Photolysis of water

55 In Calvin cycle, CO₂ reacts with RuBP to produce:

3-PGA G3P 6-Carbon unstable intermediate 1,3 bisphosphoglycerate

56 The step of Calvin Cycle where G3P is converted to RuBP is called:

Fixation Reduction Regeneration Phosphorylation

57 Pyruvate is oxidized into ______ before entering Krebs cycle.

Acetyl CoA Citrate Oxaloacetate Succinate

58 Number of carbon atoms in pyruvic acid:

2 3 4 5

59 FADH₂ is produced in Krebs cycle during conversion of:

Fumarate to malate Succinate to fumarate Malate to oxaloacetate α-Ketoglutarate to succinate

60 The only copper-containing protein in photosynthesis is:

Plastoquinone Cytochrome Ferredoxin Plastocyanin

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Chapter 2: Bioenergetics