Brainscape's Knowledge GenomeTM

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


See full index

BIO 331 > Lecture 19: Introduction of Photosynthesis > Flashcards

Lecture 19: Introduction of Photosynthesis Flashcards

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

reactions of photosynthesis

A
  1. photochemical reaction
  2. electron transfer
  3. biochemical reaction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what reactions occur in the thylakoid membrane

A

light reactions like the capture of light energy as ATP and reducing power, NADPH

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

what reactions happen in the chloroplast stroma

A

carbon fixing reactions like the transfer of energy and reducing power from ATP and NADPH to CO2

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

is oxidizing carbon in CO2 high energy or low energy

A

low

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

is reducing carbon (sugar) high energy or low energy

A

high

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

endergonic (energy in) reaction

A

potential energy of substrate is less than the product

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

exergonic (energy out) reaction

A

potential energy of substrate is greater than the product

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

what organism other than plants can photosynthesize

A

chlamydomonas cells

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

2 types of photosynthesis

A

oxygenic photosynthesis
anoxygenic photosynthesis

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

oxygenic photosynthesis

A

removal of electrons from H2O leading to release of O2 and the reduction of CO2 to carbohydrate

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

anoxygenic photosynthesis

A

do not extract electrons from water

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

types of plastids

A

proplastid, amyloplast, chromoplast, etioplast, and chromoplast

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

etioplast

A

dark grown photosynthetic tissue
NO chlorophyll

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

proplastid

A

undifferentiated, colourless
seeds, embryonic meristems, and reproductive tissues

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

chromoplast

A

red and yellow pigment (carotenoids)
flower (petal), fruit

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

what are the identity and abundance of plastids controlled by

A

developmental and environmental cues

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what do all plastids diverge from

A

proplastid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

______ induces conversion from etioplast to chloroplast

A

light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

parts of thylakoid

A

outer membrane, inner membrane, stroma, thylakoids, lamella, granum, stroma

20
Q

appressed thylakoid

A

not exposed to stroma

21
Q

non-appressed thylakoid

A

exposed to the stroma

22
Q

can the distribution of chloroplast move in response to light intensity

A

yes, it is crucial for plants living under a canopy

23
Q

different distributions of chloroplasts based on light

A

accumulation - shaded by canopy. chloroplasts are on top and bottom
avoidance - full light. chloroplasts are on side
dark position - no light, chloroplasts are on bottom

24
Q

chlorophylls

A

the essential pigments that harvest the light energy and transduce it into chemical energy

25
Q

all chlorophyll-based photosynthesis systems use __________

A

chlorophyll a

26
Q

accessory pigments

A

chlorophyll b
B-carotene
phycoerythrin
phycocyanin

27
Q

what uses chlorophyll b

A

land plants, green algae, and cyanobacteria

28
Q

what uses carotenoids

A

all chlorophyll-based photosynthesis systems

29
Q

what uses phycoerythrin

A

non-green algae

30
Q

what uses phycocyanin

A

cyanobacteria

31
Q

protoporphyrin IX

A

a precursor of Mg-containing chlorophyll and Fe-containing heme

32
Q

without ____, you cannot make chlorophyll

A

Mg 2+

33
Q

main structures of chlorophylls

A

Oxygenase, tetrapyrrole ring, and phytol tail

34
Q

difference in structures of chlorophyll a and b

A

a has a methyl group
b has a formyl group

35
Q

chlorophylls are _________ molecules

A

amphipathic

36
Q

what does amphipathic mean

A

has both hydrophobic and hydrophillic structures

37
Q

light absorbtion is affected by

A
  1. chemical structure of chlorophylls
  2. non-covalent interaction of chlorophylls with proteins in photosynthetic membranes
38
Q

what are chromoplasts and what do they contain

A

they are oil bodies that contain pigments, specifically carotenoids

39
Q

what are the functions of carotenoids

A
  1. accessory pigments
  2. protecting photosynthesizing organisms from destructive photooxidation (anti-oxidant)
  3. structural role in assemble of light harvesting complex
40
Q

types of phycobilins

A

phycocyanin and phycoerythrin

41
Q

phycobilins (accessory pigments) are

A
  1. linear tetrapyrroles (come from same pathway as chlorophyll and heme
  2. water soluble
  3. accessory pigment with no associated metal
42
Q

what do amyloplasts lack

A

pigments and elaborate inner membranes

43
Q

function of amyloplast

A

starch storage

44
Q

statoliths

A

starch-filled amyloplasts that function in gravity sensing

45
Q

chlorophyll biosynthesis

A

protoporphyrin IX is a precursor of Mg-containing chlorophyll

BIO 331 (28 decks)

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