Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > Photosynthesis 🪷 > Flashcards

Photosynthesis 🪷 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

name the 3 membranes of the chloroplast

A

outer,inner and thylakoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

name the 3 compartments of a chloroplast

A

inter membrane, stroma, thylakoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

where does photosynthesis take place?

A

chloraplasts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the grana?

A

stacks of thylakoid membranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are thylakoids connected by ?

A

intergranal lamellae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

why does a cell contain lots of chloroplasts and therefore lots of grana ?

A

very high surface area for distribution of photosystems that will eventually produce ATP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which membrane of a chloroplast is more pemeable?

A

outer membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is a photosystem ?

A

system of photosynthetic pigments found in thylakoids, they trap photons and pass energy onto primary pigment reaction centre. used during light dependent stage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the role of the photosynthetic pigment?

A

absorbs specific wavelengths of light and traps energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

name 4 photosynthetic pigments

A

chloraphills a and b, carotene and xanthophyll

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how is a photosystem arranged?

A

accessory pigments absorb light energy and funnel it down to primary pigment reaction centre

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what type of molecule is in the primary pigment reaction centre ?

A

chlorophill a

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the stroma ?

A

fluid filled matrix that contains enzymes needed to catalyse the reactions of light independent stage. contains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what group does a chlorophyll molecule hold ?

A

porphyrin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is a porphyrin group?

A

magnesium atom and long hydrocarbon chain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are the 2 wavelengths of chlorophyll a ?

A

p680 and p700

17
Q

what colour does chlorophyll a appear?

A

blue/green

18
Q

what colour does chlorophyll a absorb ?

A

red and blue (440nm)

19
Q

where is p680 found? and its peak absorption

A

photosystem 2/ 680nm

20
Q

where is p700 found and peak absorption?

A

photosystem 1 / 700nm

21
Q

what wavelength does chlorophyll b absorb?

A

400-500nm and 640nm

22
Q

what colour does chlorophyll appear ?

A

yellow/green

23
Q

what are the 2 accessory pigments ?

A

carotenoids and xanthophylls

24
Q

what wavelength does carotenoids absorb ?

A

blue- 400-500nm

25
Q

what wavelength does xanthophylls absorb?

A

blue/green- 375-500nm

26
Q

where does the light dependent stage occur?

A

thylakoids

27
Q

what does the light dependent stage consist of ?

A

light harvesting, photolysis, photophosphorylation which is production of ATP, formation of NADP, and produces by-product of oxygen

28
Q

state the equation for photolysis

A

2H2O -> 4H+ + 4E- + O2

29
Q

what are 4 roles of water in the light dependent stage?

A

1) a source of H+ used in photophosphorylation
2) donates electrons to replace those lost at the chlorophyll when light strikes
3)source of the by product O2
4) keeps plant turgid

30
Q

what Is photophosphorylation ?

A

generation of ATP and pi in the presence of light

31
Q

where does non cyclic photophosphorylation take place?

A

ps1 and ps2

32
Q

what does does non cyclic photophosphorylation produce?

A

ATP, NADPH and O2

33
Q

where does cyclic photophosphorylation take place?

A

ps1

34
Q

what does does cyclic photophosphorylation produce?

A

ATP in smaller amounts

35
Q

what type of proteins do non cyclic and cyclic photophosphorylation involve?

A

iron containing proteins in thylakoid membrane that accept and donate electrons to and from an electron transport system

36
Q

where does cyclic photophosphorylation take place ?

A

chloroplasts, some bacteria and guard cells

37
Q

where does the Calvin cycle take place ?

A

stroma of chloroplasts

38
Q

what happens in the light independent pathway?

A

where co2 is fixed with products of light dependent pathway make organic compounds to be used in the body

39
Q

why can Clavin cycle only run in light?

A

products from light dependent stage are constantly needed if there is no light, then this won’t happen.

Biology (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions