Brainscape's Knowledge GenomeTM

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


See full index

BIO 190: UNIT 2 > Chapter 7: Photosynthesis > Flashcards

Chapter 7: Photosynthesis Flashcards

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

What is the general equation for photosynthesis?

7.1

A

6 CO2 + 12 H20 + Light energy –> C6H12O2 + 6 H2O

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

In the process of photosynthesis, light energy is captures which is used to synthesize _______

7.1

A

Carbohydrates

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

In photosythesis, what molecule is Oxidized and what molecule is Reduced

7.1

A

H20 (water) = Oxidized
CO2 (carbon dioxide) = Reduced

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

What are the 2 categories that classify organisms and explain the differences?

7.1

A

Autotrophs; make organic molecules from inorganic sources
Heterotrophs; must consume food/ aquire organic molecules from environment

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

Name the organelle that photosythesis takes place in

7.1

A

The Chloroplast

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

What part of the plant does photosythesis occur?
a. Stem
b. Leaves
c. Roots
d. Bud

7.1

A

c. Leaves

specifically mesophyll cells

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

Name the 2 stages of photosynthesis

7.1

A

Light Reactions and The Calvin Cycle

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

What are the products of Light Reaction?

(hint: there are 3 products)

7.1

A

ATP, NADPH, and O2

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

What are the products of The Calvin Cycle?

7.1

A

G3P, NADP+, and ADP+Phosphate

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

Light is a type of ________ radiation; it consist of energy in the form of electric and magnetic waves

7.2

A

Electromagnetic

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

Select ALL that are TRUE

When light encounters a molecule, it can:
-Pass through the molecule
-Bounce off the molecule
-Change its path toward a different direction
-Become absorbed by the molecule
-Decrease the molecules temperature

7.2

A

-Pass through the molecule
-Bounce off the molecule
-Change its path toward a different direction
-Become absorbed by the molecule

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

______ are the molecues that can absorb light

7.2

A

Pigments

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

Molecules have 2 states, one involves the molecule in a “normal” state and the other, when the electron of the molecule absorbs energy.
Name the 2 states

7.2

A

Ground State; the “normal state”
Excited State; when an electron absorbs energy

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

Name the 3 ways electrons release energy

7.2

A

Heat, Light, and Transferred/Captured

Note: Excited electron in pigments can transfer energy only

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

What are the two types of Chlorophyll pigments?

7.2

A

Chlorophyll a AND Chlorophyll b

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

The ____ anchors the pigment to the protein within the thylakoid membrane

7.2

A

Hydrocarbon tail

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

Within the thylakoid membrane, 2 distinct pigment molecules are present.

What are these 2 pigment molecules?

7.2

A

Photosystem I and II

18
Q

Name the pigment in Photosystem II

7.2

A

P680

19
Q

Name the pigment in Photosystem I

7.2

A

P700

20
Q

The ____ ____ ____ contains the combined action of PS II and PS I

7.2

A

Linear Electron Flow

21
Q

The ____ ____ ____ uses PSI ONLY

7.2

A

Cyclic Electron Flow

22
Q

Name the products of Linear electron flow

7.2

A

ATP and NADPH

23
Q

Name the products of the Cyclic electron flow

7.2

A

ATP ONLYYYYYY

24
Q

True or False

The linear electron flow produces enough ATP to initate the Calvin Cycle

7.2

A

False, This lack of ATP production is resovled by the cyclic electron cycle

25
Q

True or False

The Calvin Cycle uses more NADPH than ATP

7.2

A

False, it uses more ATP than NADPH

26
Q

True or False

The Cyclic electron flow activates when levels of NADP+ low and NADPH is high

7.2

A

True, it also activates when ATP levels are low

26
Q

How is the ATP Synthase activated?

7.2

A

When H+ creates an electrochemical gradient in the thylakoid lumen, causing the H+ to travel and reach the ATP Synthase

NOTE: this process happens in both Linear and Cyclic Electron Flow

27
Q

PS I and II have 2 main componets.
One componet is composed of many pigment molecules anchored to the transmembrane protein
One is the site where the redox reaction takes place it and contains P680

7.3

A

Light-Harvesting Complex: The componet that contains many pigmets and is anchored to the transmembrane

Reaction Center: The site where redox reaction takes place, contain the P680

28
Q

Which protein complex/s can oxidize water, resulting in the release of O2

7.3

A

PS II ONLY

29
Q

Describe the Z Scheme model

7.3

A

Z Scheme refers to the zigzag shape of the energy curve. Z Scheme proposed that photosynthesis involves 2 events of light absorption

30
Q

What is the product of the Calvin Cycle

7.4

A

G3P or Glyceraldehyde-3-phosphate

31
Q

Name the 3 phases of the Calvin Cycle and describe their function

7.4

A

Carbon Fixation - CO2 is incorporated into RuBP, a 5-carbon sugar; the enzyme Rubisco catalyzes this reation and the 6-carbon intermediate splits into two 3-carbon molecules

Reduction and carbohydate production - ATP is used as a source of energy and NADPH is used a a source of high-energy electrons; G3P is produced

Regeneration of RuBP - Most of the G3P is used to regenerate RuBP, allowing the cycle to continue

32
Q

What environment conditions alters the operation of the Calvin Cycle

there are 3 different ones

7.5

A
  • Temperature
  • Water Avaliability
  • Light Intesity
32
Q

True or False

C3 plants are more combatable in warmer environments

7.5

A

False

33
Q

When does photorespiration occur?

7.5

A

When rubisco adds O2; as intermediates are processed, a molecule of CO2 is released

34
Q

C4 and CAM plants make ____ in the first step of carbon fixation

7.5

A

oxaloacetate

34
Q

In C4 Plants, the leaves have a two-cell layer organization. Name these two layers

7.5

A

Messophyll cells
Bundle-sheath cells

34
Q

____ Plants open their stomata at night

7.5

A

C4 or CAM Plants

35
Q

True or False

CAM and C4 plants use more energy to fix CO2 than C3 plants

7.5

A

True; C3 plants use less energy

36
Q

True or False

CAM and C4 plants are more habitable in warmer and drier environments

7.5

A

True

BIO 190: UNIT 2 (5 decks)

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