Brainscape's Knowledge GenomeTM

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


See full index

Biol 1000 > Chapter 7 > Flashcards

Chapter 7 Flashcards

1
Q

Autotrophs

A

sustain themselves w/o consuming organic molecules

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

Photoautotrophs

A

use light NRG to build organic molecules

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

Chemoautotrophs

A

use chemical NRG to build organic molecules

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

Heterotrophs

A

consume other plants or animals or decompose organic material

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

Chloroplasts

A

major sites of photosynthesis in green plants. concentrated in the cells of mesophyll

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

Chlorophyll

A

important light absorbing pigments in chloroplasts, responsible for green colour of plants and plays central role in converting solar NRG to chemical NRG

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

Stomata

A

tiny pores in the leaf that allow CO2 to enter and O to exit

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

Thylakoids

A

system of interconnected membranous sacs

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

Stroma

A

thick fluid in chloroplasts inner compartment

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

Photosynthesis is a ____ reaction

A

redox

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

Photosynthesis occurs in 2 metabolic stages

A
  • Light reaction

- Calvin cycle

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

Calvin cycle

A

cyclic series of reactions that assembles sugar molecule using CO2 and the NRG rich products of the light reactions

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

Electromagnetic NRG

A

travels in space as waves, behaves as discrete packets of NRG (photons)

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

Shorter wavelengths of light =

A

greater NRG of photon

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

Photosynthetic pigments absorb NRG of visible light but only..

A

a small part of the electromagnetic spectrum

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

Wavelengths now absorbed are..

A

either reflected of transmitted though the chloroplast

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

3 chloroplast pigments:

A
  • Chlorophyll a
  • Chlorophyll b
  • Carotenoids
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Chlorophyll a

A

absorbs mainly blue-violet and red light. reflect green

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

Chlorophyll b

A

absorbs mainly blue, organa light. reflects yellow-green

20
Q

Carotenoids

A

reflect orange and yellow

21
Q

Photo-protection

A

absorb and dissipate excessive light NRG

22
Q

Pigments in chloroplasts…

A

absorb photons

23
Q

Electron take on a _____ NRG state

A

high (become excited)

24
Q

Electron is _____ at the higher NRG state

A

unstable

25
Q

Chlorophyll and other pigment molecules:

A
  • absorb photons

- transfer the NRG to other pigment molecules

26
Q

Photosystem

A

consists of a number if light-harvesting complexes surrounding a reaction-centre complex

27
Q

Light-haresting complex contains..

A

various pigment molecules bound to proteins

28
Q

2 types of photosystems in light reaction:

A
  • photosystem 1

- photosystems 11

29
Q

Each type of photosystem has a characteristic…

A

reaction centre

30
Q

Photosystem 11 (P680)

A
  • functions first

- P680 = pigment absorbs light w/ a wavelength of 680 nm

31
Q

Photosystem 1

A
  • functions second

- P700 = absorbs light w/ a wavelength of 700 nm

32
Q

In light reaction light NRG is transformed into..

A

chem NRG of ATP and NADPH

33
Q

Between the 2 photosystems, electrons:

A
  • move down an electron transport chain

- provide NRG for the synthesis of ATP

34
Q

Products if light reactions

A
  • NADPH
  • ATP
  • Oxygen
35
Q

Chemiosmosis is the mechanism that..

A
  • involved in oxidative phosphorylation in mitochondria

- generate ATP in chloroplasts

36
Q

ATP is generated because..

A

the electron transport chain (ETC) produces a concentrationgradienj of H ion cross membrane

37
Q

Photophosphylation

A

using the initial NRG from light, the ETC pumps H into the thylakoid into the stroma through ATP synthase, producing ATP

38
Q

To produce sugar we need:

A
  • atomopheric CO2

- ATP and NADPH generated by light reactions

39
Q

Calvin cycle uses CO2, ATP, and NADPH to produce

A

glyceradehyde-3-phosphate (G3P)

40
Q

Glycerahyde-3-phosphate

A

NRG rich 3 carbon sugar

41
Q

Steps of calvin cycle include:

A
  • carbon fixation
  • reduction
  • release of G3P
  • regeneration of the starting molecules ribulose biphosphate (RuBP)
42
Q

Calvin cycle occurs in ..

A

the stroma chloroplasts

43
Q

Calvin cycle uses.

A

6 NADPH, 9 ATP per 1 net G3P produced

44
Q

Greenhouse effect

A

results from solar NRG warming our planet

45
Q

Light reactions occur in the ..

A

thylakoid membranes

46
Q

Calvin cycle occurs in the …

A

stroma of the chloroplast

Biol 1000 (15 decks)

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