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Plant Biochem - Principles till Photorespiration

Total questions: 45

Worksheet time: 26mins

Name
Class
Date
1.

What is false regarding the basic principles of plants

a)

metabolism follows principles of chemistry and physics

b)

plants reproduce to pass their genes and information to descendants which changes between different gnerations

c)

Plants must survive in their own environment

d)

Plants have limited purpose or decision making capacity

e)

Plants have a means of storing and using information

2.

Which statement is false regarding the unifying principles of plants

a)

are primary producers using solar energy

b)

Aside from certain species ALL parts of the plant are non motile

c)

Reinforced to support their mass and grow according to external stimuli (e.g. sunlight/gravity, tropism)

d)

Terrestrial plants can move minerals and water from soil to photosynthetic sites and also lose water by evaporation while evolving mechanisms to avoid dessication

3.

Which specialized plant cell type is incorrectly described

a)

Shoot/Root tips - Cell division to create new protoplasm

b)

Epidermal gland cells - protection, may use hormones

c)

Vascular cells: - Transport water only

d)

Petal cells - Produce scents to attract pollinators

e)

Root epidermal cells: To collect water and minerals

4.

What structure is described:

Protection against osmotic or mechanical rupture, create channels for transport and communication

a)

Cell Wall

b)

Cell Membrane

c)

Chloroplast

d)

Vacuoles

5.

What structure is described:

Site of Calvin Cycle reactions and source of energy for plants during the day

a)

Cell Wall

b)

Cell Membrane

c)

Chloroplast

d)

Vacuoles

6.

What structure is described:

This structure is also present in animal cells, but in plant cells these are larger and have a central location in the cell

a)

Cell Wall

b)

Cell Membrane

c)

Chloroplast

d)

Vacuoles

7.

What structure is described:

This structure is also present in animal cells, has embedded proteins which have various functions ranging from transport to communication

a)

Cell Wall

b)

Cell Membrane

c)

Chloroplast

d)

Vacuoles

8.

Plant energy source during dark conditions

a)

Mitochondria

b)

Chloroplasts

c)

Both

d)

Neither

9.

What separates two adjacent cell walls

a)

primary cell wall

b)

secondary cell wall

c)

hemicellulose

d)

middle lamella

10.

What features of pectin make it less stable compared to cellulose

a)

highly branched

b)

shorter and amorphous structure

c)

electrostatic repulsion

d)

lack of cross linkages

11.

The secondary cell wall has more _____ and _____ which make it more rigid than the primary cell wall

a)

Cellulose and hemicellulose

b)

hemicellulose and lignin

c)

pectin and lignin

d)

cellulose and lignin

12.

What structures in cell walls aid in its transport function

a)

plasmodesmata

b)

desmotubule

c)

middle lamella

d)

stroma

13.

_____ is attraction between water molecules, _______ is attraction of water to other molecules like solid surfaces

a)

adhesion, cohesion

b)

cohesion, adhesion

c)

cohesion, cohesion

d)

adhesion, adhesion

14.

Major source of water loss in plants

a)

respiration

b)

transpiration

c)

photosynthesis

d)

catabolism

e)

anabolism

15.

This form of water transport is driven by random thermal motion

a)

Bulk Flow

b)

Diffusion

c)

Vesicles

d)

Endocytosis

16.

Lack of _______ due to excessive loss of water can result in _______

a)

turgor pressure, plasmolysis

b)

bulk flow, dehydration

c)

osmotic flux, metabolic stasis

d)

nutrition, starvation

17.

What is the overall reaction for light reactions

a)

2NADP+ + 2H2O + xADP + xPi -> 2NADPH + 2H+ + O2 + xATP +

H2O

b)

2NADP+ + 2H2O + xATP + xPi -> 2NADPH + 2H+ + O2 + xADP +

H2O

c)

12NADPH + 18ATP + 6CO2 -> C6H12O6 + 12NADP+ + 18ADP +
18Pi

d)

18NADPH + 12ATP + 6CO2 -> C6H12O6 + 18NADP+ + 12ADP +
18Pi

18.

What does this describe:

Highly structured internal system of membranes containing chlorophyll and associated proteins for photosynthesis

a)

stroma

b)

thylakoid

c)

lumen

d)

envelope

19.

Chlorophyll is similar to porphyrin-like groups in hemoglobin and the cytochromes. This is through the tetrapyrrole ring with _____ in the center

a)

Fe2+

b)

Fe3+

c)

Mg2+

d)

Cu2+

20.

This form of chlorophyll has higher absorption in the 600nm range

a)

a

b)

b

c)

c

d)

all of the above

21.

Which pathway for excited chlorophyll is not described accurately

a)

LOSS OF LIGHT: re-emit a photon and return to its
ground state (fluorescence)

b)

LOSS AS HEAT: return to its ground state by directly
converting its excitation energy into heat accompanied with
emission of a photon

c)

RESONANCE ENERGY TRANSFER: participate in
energy transfer

d)

PHOTOCHEMISTRY: use its energy to cause chemical
reactions to occur

22.

Light reactions happen in the

a)

thylakoid

b)

stroma

c)

lumen

d)

grana

23.

These set of reactions are also collectively known as the calvin cycle

a)

light dependent reactions

b)

light independent reactions

c)

respiration

d)

transpiration

24.

Which complexes generate ATP (by generating a proton gradient) in the light reactions

a)

O2 evolving complex

b)

P680

c)

Cytochrome b6f complex

d)

P700

25.

Which complex passes on its energy to FeS proteins

a)

O2 evolving complex

b)

P680

c)

Cytochrome b6f complex

d)

P700

26.

Photosystem 2 contains ________

a)

P680

b)

oxygen evolving complex

c)

cythochrome b6f

d)

P 700

27.

Which are plastoquinones

a)

Qa

b)

Qb

c)

Pheophytin

d)

PS I

e)

PS II

28.

How is NADPH produced in the light reactions used?

a)

to pump protons and generate a proton gradient from the lumen to the stroma

b)

to reduce CO2 in the Calvin Cycle

c)

To regenerate FeS proteins

d)

as a substrate for the light reaction

29.

In generating a proton gradient, which section has a lower pH

a)

thylakoid lumen

b)

chloroplast stroma

30.

Which protein complex(es) are not accurately described

a)

Photosystem II

oxidizes H2O to O2 in the thylakoid lumen and in the process releases protons into

the lumen

b)

Cytb6f
receives electrons from PSII and delivers them to PSI; also transports additional
protons into the lumen from the stroma

c)

Photosystem I

produces ATP as protons diffuse back through it from the lumen into the stroma

d)

ATP synthase

reduces NADP+ to NADPH in the stroma by the action of ferredoxin and FNR

31.

Starting from RuBP what are the main steps of the calvin cycle (in order)

a)

regeneration, carboxylation, reduction

b)

reduction, regeneration, carboxylation

c)

carboxylation, reduction, regeneration

d)

reduction, carboxylation, regeneration

e)

carboxylation, regeneration, reduction

32.

What enzyme carboxylates RuBP

a)

RUBISCO

b)

3 PGA

c)

NADP-glyceraldehyde-3-phosphate dehydrogenase

d)

RuBP dehydrogenase

33.

In the reduction portion of the calvin cycle, _ ATP is consumed and _ NADP+ is produced to ultimately produce one molecule of glucose

a)

6,6

b)

6,12

c)

12,6

d)

12,12

e)

3,3

34.

How many G3Ps are used to regenerate 3RuBP, (answer as a number only)

(a)  

35.

How many ATP is consumed to regenerate 3 molecules of RuBP

(a)  

36.

How many cycles of the calvin cycle is needed to produce one molecule of glucose (answer as a number only)

(a)  

37.

Which segment of the calvin cycle takes the longest

a)

Carboxylation

b)

Reduction

c)

Regeneration

38.

what two functions can RUBISCO perform on RuBP

a)

carboxylation

b)

oxygenation

c)

reduction

d)

oxidation

e)

reshuffling

39.

What are the products of RuBP and oxygen in the enzymatic oxygenation of RUBISCO

a)

PGA and Phosphoglycolate

b)

2PGA

c)

2PGA and phosphoglycolate

d)

2Phosphoglycolate

40.

What is phosphoglycolate converted to in photorespiration

a)

glycolate

b)

glyoxylate

c)

glucose

d)

phosphoglycerate

41.

Where does photorespiration occur

a)

thylakoid

b)

stroma

c)

mitochondria

d)

chlorplasts

e)

peroxisomes

42.

What amino acids CANNOT be synthesized from intermediates of photorespiration

a)

Glycine

b)

Serine

c)

Tryptophan

d)

Lysine

e)

Aspartate

43.

What is not an explanation on usefulness of photorespiration

a)

it prevents the plant being overloaded with glucose

b)

To pass on excess light energy

c)

to produce some amino acids

d)

To offer balance of redox potential

44.

Which plants are less sensitive to photorespiration

a)

C1

b)

C2

c)

C3

d)

C4

45.

What is NOT a method of processing photosynthates?

a)

synthesis of new cellular components

b)

export as sucrose to other parts of the plant

c)

conversion to hexose phosphates

d)

release into soil matrices in exchange for essential vitamins and minerals

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