Transport in Plants

Question 1

Diffusion depends on

Answer 1

Conc and pressure gradient, temperature, permeability of membrane, solubility of particles in lipids

Question 2

Water channels have?

Answer 2

8 different types of aquaporins

Question 3

Water content in watermelons? Dry weight of herbaceous plants?

Answer 3

92%, 10-15%

Question 4

Mature corn water uptake? Mustard?

Answer 4

3L/ day. Own weight/5 hours

Question 5

Solute potential is always?

Answer 5

Negative

Question 6

What contributes to the solute potential of cell?

Answer 6

Vacuolar sap

Question 7

Sign of osmotic pressure and osmotic potential?

Answer 7

Opposite

Question 8

Water loss sequence in plant cell?

Answer 8

Cytoplasm –> Vacuole

Question 9

Turgor pressure is the?

Answer 9

Pressure potential

Question 10

Diffusion rate across a typical cell?

Answer 10

50um/2.5s

Question 11

Xylem transports?

Answer 11

Water, minerals, some organic nitrogen and hormones

Question 12

In young roots, water?

Answer 12

Directly enters xylem

Question 13

Plants give what to the fungus?

Answer 13

Sugars and N containing compounds

Question 14

Rate of water flow by transpiration?

Answer 14

15m/hr

Question 15

% of water used for plant processes

Answer 15

less than 1

Question 16

Check transpiration using?

Answer 16

Cobalt chloride paper

Question 17

Stomata microfibrils are made of?

Answer 17

Cellulose

Question 18

Adhesion is?

Answer 18

Attraction of water molecules to polar surfaces

Question 19

Transpiration pull can pull water up to?

Answer 19

130m

Question 20

Transpiration cools leaf by?

Answer 20

10-15 degree

Question 21

C4
 plants are twice as efficient as C3
 plants in terms of fixing carbon
dioxide (making sugar). However, a C4
 plant loses only half as much water
as a C3
 plant for the same amount of CO2
 fixed.

Answer 21

k

Question 22

Suberin has the ability to

Answer 22

Conduct active transport in one direction only

Question 23

Loading sequence?

Answer 23

Companion cells –> Phloem

Question 24

Calvin nobel?

Answer 24

1961