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bioenergetics Flashcards

1
Q

bio energy transformation obeys the laws of?

A

themrodynamics

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2
Q

In photosynthesis CO2 is r/o?

A

reduced

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3
Q

CO2 is reduced to _ in photosynthesis

A

Glucose

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4
Q

H2O is r/o in photosynthesis

A

Oxidized

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5
Q

Water is oxidized into _ in photosynthesis

A

Oxygen

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6
Q

Reducing agent in photosynthesis is?

A

Water

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7
Q

oxidizing agent in photosynthesis?

A

Molecular O2

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8
Q

range of visible light?

A

380-750nm

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9
Q

wavelength most effective for photosynthesis?

A

Blue ( 430 nm ) Red ( 670 nm )

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10
Q

pigments are embedded in?

A

thylakoid of chloroplast

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11
Q

major pigments of plant are?

A

chlorophyll and carotenoids

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12
Q

pigment of chlorophyll a

A

bluish green

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13
Q

chlorophyll a present in all photosynthetic organism except

A

photosynthetic bacteria

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14
Q

pigment of chlorophyll b

A

yellow green

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15
Q

chlorophyll b present in all photosynthetic organism except

A

brown red algae, photosynthetic bacteria

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16
Q

type of chlorophyll in photosynthetic bacteria?

A

bacteriochlorophyll

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17
Q

Molecular formula of chlorophyll a?

A

C55 H72 O5 N4 Mg

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18
Q

Molecular formula of chlorophyll b?

A

C55 H70 O6 N4 Mg

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19
Q

Head of chlorophyll has?

A

Porphyrin ring with Mg in center

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20
Q

1 porphyrin ring has

A

4 pyrrole ring

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21
Q

each pyrrole ring consists of?

A

4 Carbon
1 Nitrogen

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22
Q

The _ atom of pyrrole ring interact with Mg atom

A

Nitrogen

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23
Q

The head of chlorophyll is?

A

Light absorbing
Hydrophillic

24
Q

the tail of chlorophyll has?

A

Phytol tail

24
Q

Difference between chlorophyll a and b?

A

Chlorophyll a —-> has Methyl CH3 group on 2nd pyrrole ring

Chlorophyll b —–> has Carbonyl CHO group on 2nd pyrrole ring

25
Q

Formula of phytol

A

C20H39

26
Q

Nature of chlorophyll tail?

A

Hydrophobic

27
Q

Nature of carotenoids?

A

Terpenoid lipids

28
Q

Carotenoids absorb light?

A

Blue-Violet range

29
Q

Types of carotenoids?

A
  1. Carotene
  2. Xanthophyll
30
Q

Carotenes are __ pigments

A

Orange red

31
Q

Carotenes are composed of

A

isoprenoid units

32
Q

Xanthophyll are _ pigments

A

Yellow

33
Q

Widely distributed xanthophyll is?

A

Lutein

34
Q

Accessory pigments are?

A

Chlorophyll b + Carotenoids

35
Q

Photosystem are located in?

A

Thylakoid membrane

36
Q

Accessory pigments are located?

A

In antenna complex of photosystem

37
Q

Reaction centre contains

A

chlorophyll a

38
Q

Max absorption of PS1?

A

700nm

39
Q

Max absorption of PS2?

A

680nm

40
Q

Which photosystem was discovered first?

A

PS1 / P700

41
Q

PS1 is involved in

A

cyclic + non cyclic phosphorylation

42
Q

PS2 is involved in

A

Only non cyclic phosphorylation

43
Q

Carbon source for synthesis of organic compound in photosynthesis is provided by?

A

CO2

44
Q

Light rxn of photosynthesis occurs in?

A

Thylakoid

45
Q

Dark rxn of photosynthesis occurs in?

A

Stroma
(daytime)

46
Q

What’s the input of light reaction?

A

Light + water

47
Q

What’s the input of dark reaction?

A

ATP, NADPH , CO2

48
Q

Output of light rxn?

A

ATP, NADPH , O2

49
Q

Output of dark rxn?

A

glyceraldehyde 3 phosphate

50
Q

most imp event in light rxn is production of

A

ATP

51
Q

The mechanism of production of ATP during light rxn?

A

Chemiosmosis

52
Q

the excited electrons liberated from PS1 are accepted by?

A

NADP+

53
Q

Chlorophyll a is strong _ agent

A

Oxidizing

54
Q

The holes of PSII are filled by?

A

electrons released by photolysis of H2O

bio (23 decks)

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