Exam 1

Question 1

Chlorophyll absorbs mostly ____ and ____ but reflects _____ light.

Answer 1

Red, blue, green

Question 2

The major source of energy for all life on earth is the

Answer 2

Sun

Question 3

Photosynthesis can best be described as an

Answer 3

Process that converts light energy to chemical energy

Question 4

A method for synthesizing ATP that uses sunlight as the energy source and occurs on the chloroplast is called

Answer 4

Photophosphorylation

Question 5

All of the following are electron carriers except

Answer 5

Chlorophyll b

Question 6

Plants ___ light

Answer 6

Absorb ~5% of incident

Question 7

As light hits a pigment, each of the following is possible except for

Answer 7

Passed through, moving a proton out of the nucleus

Question 8

Light is absorbed by ____ in the ____ and passes to the ____

Answer 8

Accessory pigment, antenna complex , reaction center

Question 9

T/F

RuBisCO is an ideal enzyme

Answer 9

False

Question 10

The ultimate source of electrons during photosynthesis is ___

Answer 10

Water

Question 11

All of the following are electron carriers between Photosystem II and Photosystem I except

Answer 11

FDN (Ferredoxin/NADPH+ reductase)

Question 12

A CAM plant opens its stomata during the ___ and closes then during the ____

Answer 12

Night

Day

Question 13

During photosynthesis, photolysis liberates protons in the

Answer 13

Thylakoid lumen

Question 14

During C3 photosynthesis, the enzyme that catalyzes the reaction with atmospheric carbon dioxide is

Answer 14

RuBidCO

Question 15

When Photosystem I produced NADPH, it’s reaction center ____ chlorophyll a loser electrons

Answer 15

P700

Question 16

In a C4 plant, PEP carboxylase is located in the _____, whole RuBisCO is located in the

Answer 16

Mesophyll cells, bundle sheath cells

Question 17

Which part of the electromagnetic spectrum is most relevant to photosynthesis

Answer 17

Visible spectrum

Question 18

Which are the correct chemical molecules for photosynthesis?

Light energy+ 6 (?) + 6 H2O —-> C6H12O6 + 6 O2

Answer 18

CO2

Question 19

Which are the correct chemical molecules for photosynthesis?

Light energy+ 6 CO2 + 6 (?) —-> C6H12O6 + 6 O2

Answer 19

H2O

Question 20

Which are the correct chemical molecules for photosynthesis?

Light energy+ 6 CO2 + 6 H2O —-> (?) + 6 O2

Answer 20

C6H12O6

Question 21

Which are the correct chemical molecules for photosynthesis?

Light energy+ 6 CO2 + 6 H2O —-> C6H12O6 + 6 (?)

Answer 21

O2

Question 22

The main difference between (fish symbol -) and b- glucose is

Answer 22

The OH bond flips direction at C1

Question 23

Starch consists of

Answer 23

a1,4 and a1,6 bonds

Question 24

Cell walls

Answer 24

Are a layer of additional protection
Create turgor pressure along with the large central vacuole
Are largely made of beta glucose molecules
All of the above (a-c)

Question 25

The steps of the stromal reactions of photosynthesis in order are

Answer 25

Fixation Reduction Regeneration

Question 26

The enzyme responsible for fixing carbon during photosynthesis (C3) is

Answer 26

RuBisCO

Question 27

The thylakoid reactions produce ____ that are used in the storm all reactions

Answer 27

ATP | NADPH

Question 28

Which of the following is not photoautotrophic

Answer 28

The center of a woody stem

Question 29

T/F | RuBisCO has a much lower affinity for CO2 than PEP carboxylase

Answer 29

True

Question 30

The two most important long-term storage forms of energy and carbon in plants are:

Answer 30

Starch and lipids

Question 31

T/F | Some electron carriers are embedded in the thylakoid membrane, such as cytochromes and plastoquinones.

Answer 31

True

Question 32

T/F | If a compound gains an electron, it has been reduced

Answer 32

True

Question 33

Considering the way in which photosystems I and II work together, the ultimate source of electrons to reduce NADP to NADPH is:

Answer 33

Water

Question 34

In the citric acid cycle, citrate is oxidized through many steps to oxaloacetate, releasing energy. A majority of the usable energy released is stored temporarily in:

Answer 34

NADH

Question 35

T/F | The breakdown of glucose produces organic compounds that are used to synthesize amino acids, fats and nucleus acids

Answer 35

True

Question 36

Water must reach leaves of the tallest trees, such as eucalyptus. Water moves upward in one of those trees due to

Answer 36

The pulling of water columns up from the top

Question 37

Companion cells regularly communicate with their associated sieve tube members. The mechanisms involved may include which of the following?

Answer 37

Plasmodesmata

Question 38

Which of the following experimental conditions could cause stomatal openings in a plant

Answer 38

Lower the amount of CO2 around the plant

Question 39

Most evidence supports the ___ as the mechanism by which water and nutrients are transported through the phloem.

Answer 39

Pressure flow hypothesis

Question 40

T/F | If the water potentials of two adjacent regions are equal, water molecules stop moving between the two areas.

Answer 40

False

Question 41

T/F | Na+ transport from and to the guard cells is the major driving force behind stomata opening and closing

Answer 41

False

Question 42

Which plastid is responsible for storing starch?

Answer 42

Amyloplasts

Question 43

During photosynthesis, photolysis liberates protons in the

Answer 43

Thylakoid lumen

Question 44

The most common plant pigment involved in photosynthesis is

Answer 44

Chlorophyll a

Question 45

The flow of electrons from water to NADPH during the light-dependent reactions of photosynthesis.

Answer 45

Noncyclic photophosphorylation

Question 46

A special chlorophyll a molecule actually involved in the transfer of electrons in photosynthesis.

Answer 46

Reaction center