XI th Assignment SIX TRANSPORT IN PLANTS + MINERAL NUTRITION

01.Bulk flow of substances over the longer distances through the vascular tissue is called: (1)simple diffusion (2)active transport (3)translocation (4)facilitated diffusion 02.Guttation is the loss of impure water which is the result of: (1)osmosis (2)root pressure (3) diffusion (4)transpiration 03.At which cell layer,water movement through the apoplast pathway is restricted & is facilitated towards symplast path way? (1)epidermis (2)cortex (3)pericycle (4)endodermis 04.Bidirectional translocation of minerals takes place in: (1) xylem (2)phloem (3)parenchyma (4)cambium 05.Translocation of food in flowering plants occur in the form of: (1)starch (2)glucose (3)sucrose (4)glyceraldehydes 06. -----inhibits calcium translocation in shoot apex: (1) Mg (2) Cu (3) Mn (4) K 07. A cell swells up when kept in: (1)hypertonic solution (2) hypotonic solution (3)isotonic solution (4)any of the three 08.Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is _______ (1) cohesive forces (2) adhesive forces (3)transpiration pull (4)root pressure 09. Boron is required for: (1)pollen germination (2)cell elongation & cell differentiation (3)carbohydrate translocation (4) all of these 10. Which of the following has maximum water potential? (1) Pure water (2) 2% sucrose solution (3) 4% glucose solution (4) 10% Sodium chloride solution. 11. The osmotic potential and pressure potential of three cells (A, B, C)located in different parts of an actively transpiring plant are as following.

Cell Osmotic potential

Pressure potential(MPa)

A -0.87 0.44

B -0.92 0.34

C -0.68 0.27

Which of the cells have the highest water potential?

(1) A (2) B (3)C (4)All of these 12. Arrange the events of opening stomata in correct sequence and choose the correct option accordingly I. Lowering of osmotic potential of guard cells. II. Decline in guard cell salute. III. Rise of Potassium ion level in guard cells. IV. Guard cells absorbs water from neighbouring epidermal cells. V. Guard cells become flaccid VI. Guard cells swell and make pore between them. (1)III, I, IV, V (2)I,II,II,IV,V,VI (3)III, I, IV, VI (4)III,I,IV,VI,II,V 13. In the given schematic diagram, pathway of water movement inside the root is shown from soil from xylem. Identify the tissue involved in the steps A-C and choose the correct option accordingly.

(1)A-Hypodermics, B-Medullary rays, C-Metaxylem (2)A-Cortex, B-Pericycle, C- Metaxylem (3) A- Pricycle, B- Cortex,C- Metaxylem (4) A-Hypodermics B-Cortex C-Vascular tissues 14. Why seeds kept in water swell up? (1) OP inside the seed is slow (2) OP of water is high (3) Water potential gradient develops between the seed coat and water (4)Diffusion pressure deficit of seed is very high 15. Match the following:

a. Mineral ions I . water droplets

b. Xylem II. Cell wall

c. Guttation III. Protoplast

d. Symplast IV. Unidirectional

e. Apoplast V. Active absorption

(1)a-V,b-IV,c-I,d-III,e-II (2)a-II,b-III,c-IV,d-V,e-I (3)a-I,b-II,c-III,d-IV,e-V (4)a-III,b-IV,c-V,d-II,e-I 16.The major role of minor elements inside living organisms is to act as: (1)binder of cell structure (2)co-factor of enzymes (3) building blocks of important amino acids (4)constituents of hormones

17.Which of the following is not caused by deficiency of mineral nutrients: (1) necrosis (2) chlorosis (3) etiolation (4) shortening of internodes 18.Denitrification is carried out by: (1)nitrsomonas (2)pseudomonas (3) nitrobacter (4)nitrococcus 19.Ion transport in roots occurs: I.passively through channels II.actively through channels III.actively through carriers IV.through both symplast & apoplast (1) I & III (2) II,III,IV (3) I,III,IV (4) III,IV 20.Leghaemoglobin helps in : (1) transport of food in plants (2) nitrogen fixation (3)nodule formation (4) protecting nitrogenase from oxygen 21.The free living anaerobic nitrogen fixer: (1)Rhodospirillum (2) Beizernickia (3) Anabaena (4) Rhizobium 22.Which group of plants can grow in nitrogen deficient soil ? (1)lichens (2) gymnosperms (3) bryophytes (4) insectivorous plants 23.Phosphorus & nitrogen ions generally get depleted in soil because they usually occur as: (1)neutral ions (2)negatively charged ions (3)positively charged ions (4)both positively & negatively charged but disproportionate mixture 24.Passive absorption of minerals depends upon: (1)temperature (2)temperature & metabolic inhibitor (3)metabolic inhibitor (4)humidity 25.The first stable product of fixation of atmospheric nitrogen in leguminous plants is: (1)glutamate (2)ammonia (3)asparagine (4)none 26.The conversion of ammonia into nitrites & nitrates is called: (1) ammonification (2) denitrification (3) nitrification (4) all of these 27.The deficiency symptoms of which of the following element is found first in mature leaves ? (1) iron (2) calcium (3) magnesium (4) nitrogen 28.Which elements are essential for the photolysis of water ? (1) Mg & P (2) Zn & I (3) Ca & Cl (4) Mn & Cl 29.The element molybdenum plays its role in: (1)nitrogen fixation (2) sugartranslocation (3)ion transport (4)carbon assimilation 30. Which of the following elements is a constituents of biotin ? (1) magnesium (2) sulphur

(3) calcium (4) phosphorus

Test 06 – Transport in plants and Mineral nutrition By Monika Deshmukh

01. In facilitated diffusion, why the rate of diffusion of a substance along the concentration gradient does not increase continuously, while the concentration difference of the molecules across the membrane increases? a) Process of facilitated diffusion need ATP b) As concentration difference increases, molecule interfere with one another c) 100% saturation of carrier protein after some time d) Transport proteins must be of channel protein type

02. Read carefully the following statements and choose the right answer from the options given below I. Diffusion is a slow process and it do not depends upon the living system II. Usually process of diffusion does not need energy III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue IV. Diffusion is a rapid process over short distance, but extremely slow over long distances a) I and III b) I and II c) III and IV d) I, II, III and IV

03. Which of the following pair is selective and specific mode of transport? a) Passive transport and active transport b) Passive transport and facilitated transport c) Facilitated transport and active transport d) Simple diffusion and Facilitated transport

04. Water channels are possessed by a

membrane to facilitate the movement of hydrophilic substances. These channels are made up of a) Eight similar type of aquaporin b) Eight different type of aquaporin c) Eight similar and eight different aquaporin d) Do not possess any water channel

05. In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops? a) The level of solution in thistle funnel rises up

b) The level of solution in thistle funnel lowers c) The level of solution in beaker lowers d) The level of solution remains unaffected in beaker

06. Plasmolysis is the result of a) Exosmosis b) Endosmosis c) Reverse osmosis d) Diffusion

07. The membrane, which allows passage of certain substances more readily than others is termed as a) Permeable b) Selectively permeable c) Semi-permeable d) Impermeable

08. When the concentration of the soil solutes is low, the absorption of water a) Remains normal b) Is stopped c) Is increased d) Is decreased

09. . The first process by which water enters into the seed coat when a seed is placed in suitable environment for germination is a) Osmosis b) Active transport c) Absorption d) Imbibition

10. If sugars are actively moving into a cell, what will happens to the turgor pressure of the cell? a) TP increases, due to the entry of water b) TP decreases because water exits c) TP increases as sugar concentration affects it directly d) No effect of sugar concentration on turgidity hence no change

11. Which of the following statements is/are true? I.The apoplastic movement of water occurs exclusively through the cell wall without crossing any membranes. II.Solutes present in a cell (or in any solution) increase the free energy of water or water potential. III.The symplastic movement occurs from cell to cell through the plasmodesmata. IV.Membrane permeability depends on the membrane composition, as well the chemical nature of the solute. a) I and II only b) II and III only c) I, III and IV only d) I, II and IV only

12. Passage cells are thin-walled cells found in a) Endodermis of roots facilitating rapid transport of water from cortex to pericycle

Test 06 – Transport in plants and Mineral nutrition By Monika Deshmukh

b) Phloem elements that serve as entry points for substances for transport to other plant parts c) Testa of seeds to enable emergence of growing embryonic axis during seed germination d) Central region of style through which the pollen tube grow towards the ovary

13. A portion of transverse section of root is shown in the diagram. Label A-H in the given diagram and choose the correct option accordingly

a) A-Apoplastic, path; B-Symplastic, path; C-Endodermis; D-Pholem; E-Cortex; F-Casparian strip; G-Pericycle; H-Xylem b) A-Symplastic, path; B-Apoplastic, path; C-Xylem; D-Pholem; E-Endodermis; F-Cortex; G-Casparian strip; H-Pericycle c) A-Symplastic, path; B-Apoplastic, path; C-Endodermis; D-Xylem; E-Cortex; F-Casparian strip; G-Pericycle; H-Phloem d) A- Apoplastic, path; B-Symplastic, path; C-Endodermis; D-Cortex; E-Casparian strip; F-Xylem; G-Phloem; H-Stele

14. Which one is not the job of zone of cell differentiation in roots? a) Mineral uptake b) Water uptake c) CO2 uptake d) O2 uptake

15. In which of the following plants, there will be no transpiration? a) Aquatic, submerged plants b) Plants living in deserts c) Aquatic plants with floating leaves d) Plants growing in hilly regions

16. Some elements like calcium are not remobilised because they are a) Structural componentb) Heavy metals c) Less charged d) Macromolecules 17. Why the transport of organic food through phloem is bidirectional? a) Roots serve as source while leaves are the sink region b) Source and sink region are irreversible

c) The relationship between the two region (source and sink) is variable and is dependent on season and plant needs d) Translocation of organic solute is regulated by energy

18. Choose the false statement a) If bark of tree is girdled from main stem, the plant dies because ascent of sap is stopped b) If xylem is girdled from main stem, wilting of leaves takes place first c) In the flowering plant food is transported in the form of dissacharide sucrose d) In Girdling experiment, in a plant, root dies first

19. In the hydroponics plant production technique, in order to obtain the optimum growth, nutrient solutions must be a) in anaerobic condition b) Adequately aerated c) Diluted d)at alkaline pH 20. Choose a true statement regarding essential mineral elements of plants a) Minerals present in the soil cannot enter the plants b) Gold is the only element which cannot be accumulated by the plants c) Plants growing near the nuclear test sites takes up the radioactive strontium d) Minerals present in very low concentration cannot be detected and, hence they remain undiscovered 21. In addition to known essential elements, there are some beneficial elements. These are required by the a)lower plants b)higher plants c)all plants d)essential elements are same as beneficial elements so required by all plants 22. Which of the following elements can be considered as macronutrients for plants? a) Zinc b) Boron c) Nickel d) Phosphorus

23. The ultimate source of nitrogen is a) Atmospheric nitrogen b) Nitrogen present in soil c) Nitrogen that comes from water

Test 06 – Transport in plants and Mineral nutrition By Monika Deshmukh

d) Nitrogen fixed by the process of photosynthesis

24. Mg2+ is an activator of I. alcohol dehydrogenase II. nitrogenase III. ribulose bisphosphate carboxylase oxygenase IV. phosphoenol pyruvate carboxylase a) Only III b) Only I c) Only IV d) III and IV

25. Appearance of yellowish edges in the leaves is due to deficiency of a)Ca b)P c)Cu d)Mg

26. On the basis of symptoms of chlorosis in leaves, a student inferred that this was due to the deficiency of nitrogen. This inference could be correct only if we assume that yellowing of leaves appeared first in a) Old leaves b)young leaves c) Young leaves followed by mature leaves d) Young leaves followed by young leaves

27. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport? a) Cu, Mn and Fe b) Co, Ni and Mo c) Mn, Co and Ca d) Ca, K and Na

28. Select the incorrect statement a) Anabaena and Nostoc are not capable of fixing nitrogen in free living state b) Phosphorus is a constituent of cell membranes, certain nucleic acid and cell proteins c) Root nodule forming nitrogen fixers live as aerobes under free-living conditions d) Nitrosomonas and Nitrobacter are chemoautotrophs

29. For the limited nitrogen that is present in the soil, microbes compete with a) Animals b) Plants c) Both (a) and (b) d) None of these 30. Pick the correct set of statements for the given diagram N2-fixation and choose the correct option accordingly

I. Nitrogenase catalyses the reaction II. The formation of ammonia is a reductive process III. One molecule of nitrogen produces two molecules of ammonia IV. Nitrate reductase catalyse the reaction V. Formation of ammonia is an oxidative reductive process VI. One molecule of nitrogen produces one molecule of ammonia Which is the correct option? a) I, II and III b) IV, V and VI c) I, V and VI d) III, IV and V

Assignment -6

Transport of plants & Mineral

nutrition

Compiled by : PP

1) In flowering plants which of the following need not to be transported – 1.water and mineral nutrients 2.organic nutrients & growth regulators 3.detergents and drugs 4.pigments and alkaloids 2) Which of the following undergo multidirectional transport? 1. warer and minerals 2. organic and mineral nutrients 3. hormones and growth regulators 4. chemical stimuli 3) But ‘ diffusion in solids rather than solids are more likely’ explains 1. in solids diffusion is rapid 2. in solids diffusion is slow 3. in solids diffusion is less but through intermolecular spaces. 4. in solids diffusion is impossible 4) The substances that have hydrophilic moiety – Select correct statement (s). 1. do not set up concentration gradient 2. concentration gradient must already to be present 3. concentration gradient not required in facilitated diffusion 4. facilitated diffusion is through proteins 1. 1 and 2 2. 2 and 3 3. 3 and 4 4. 1,2,and 4 5) In an extracellular molecule bound to the transport protein- 1. then releases normally inside the cell 2.then releases by squeezing inside the cell 3.then releases by rotating inside the cell 4.then releases by osmosis inside the cell 6) Which statement is incorrect about aquaporins? 1. also called water channel 2.are integral membrane proteins 3. are hydrophobic, intrinsic membrane proteins 4. are hydrophilic, intrinsic membrane proteins 1. 1,2 and 3 2. 2 and 3 3. 4 only 4. 1 and 4 only 7) Here is given comparison of different transport mechanisms . Fill the gaps A,& B

Property Simple Facilitated Active

diffusion transport transport

Requires special membrane proteins

A B B

Highly selective

A B B

Transport saturates

A B B

Uphill transport

A A B

Requires ATP A A B

1.A marks ‘yes’ and B marks ‘no’

2. A marks ‘no’ and B marks ‘yes’

3. Both A and B are ‘Yes’

4. Both A and are ‘no’

8) For the solution at atmospheric pressure-

1. ѱw = ѱs 2. ѱw + ѱs

3. ѱw - ѱs 4. ѱw ≥ ѱs

9) Psi or ѱ is expressed in pressure unit such

as-

1. Daltons 2. Pascals

3. Newtons 4. OsmoL

10) Which of the following makes cell turgid?

1. when water enters a plant cell due to

diffusion causing a pressure built up against

the cell wall.

2. when water enters a plant cell due to

diffusion causing a pressure built up against

the cytoplasm.

3. when water exists a plant cell due to

diffusion causing a pressure built up against

the cell wall.

4. when water withdraws from a plant cell

due to osmosis causing a pressure built up

against the cell wall.

11) Study figure in which the two chambers A

and B, containing solutions are separated by a

semipermeable membrane

(i) Solution of which chamber has a lower

water potential?

(ii) Solution of which chamber has a lower

solute potentia?

(iii) In which direction osmosis occurs?

(iv) At equilibrium which chamber will have

lower water potential?

1.(i)-A, (ii) -B, (iii)-A to B, (iv)-A

2.(i)-B, (ii)-A, (iii)-B to A, (iv)-B 3.(i)-B, (ii)-B, (iii)-A to B, (iv)-same 4.(i)-A, (ii)-A, (iii)-A to B, (iv)-same 12)Match the columns –

Sr No

Behaviour of cell

Effect

1. Isotonic i. solution is more dilute than the cytoplasm

2. Hypotonic ii. solution balances the osmotic pressure of the cytoplasm

3. Hypertonic iii. solution is more concentrated

1. 1-iii,2-ii,3-i 2. 1-ii,2-i,3-iii

3. 1-ii,2-i,3-iii 4. 1-i,2-ii,3-iii

13) Refer two figures shown below one shows

entry of water through a semipermeable

membrane and other shows that pressure is

given to stop diffusion into funnel through

membrane.

Following conclusion is drawn. Select the

improper one-

1)pressure required to prevent water from

diffusing is osmotic pressure.

2. osmotic pressure is the function of the

solute concentration

3. more is the solute concentration, less is

the pressure applied

4. here osmotic pressure is equivalent to the

osmotic potential

5. osmotic potential is negative while osmotic

pressure is positive

1. 1 and 2 2. 2 and 4

3. 4 and 5 4. Only 3

14) The diagram below represents two

process underwent by a plant cell.

Identify the process X and Z

1. X- plasmolysed and Z is flaccid

2. X- flaccid and Z is turgid

3. X- turgid and Z is plasmolysed

4. X- turgid and Z is also turgid

15)See figure 1,2,3,4 and label correctly-

1.1- Cell wall, 2- cytoplasm,3- vacuole, 4-

plasmadesmata

2. 1- cytoplasm,2-cell wall, 3- nucleus,4-

plasmdesmata

3. 1- plasmadesmata,2-cytoplasm,3-

vacuole,4- cell wall

4. 1-Cell wall,2- cell membrane, 3-

cytoplasm, 4- plamadesmata

16) Which one of the following roles is not

characteristic of an essential elements?

1.being a component of biomolecules

2. changing the chemistry of the soil

3.being a structural component of energy

related chemical compounds

4. activation or inhibition of enzymes

17) Which one of the following statements can best explains the term critical concentration of an essential element? 1. essential element concentration below which plant growth is retarded. 2.essential element concentration below which plant growth become stunted. 3.essential element concentration below which plant remains in the vegetative phase 4. essential element concentration below which plant remains in the reproductive phase 18) Deficiency symptoms of an element tend to appear first in young leaves. It indicates that the element is relatively immobile. Which one of the following elemental deficiency would show such symptoms? 1. S 2 Mg 3. N 4.K 19) Which one of the following symptoms is

not due to manganese toxicity in plants? 1. Calcium translocation in shoot apex is inhibited

2. Deficiency in both Iron and Nitrogen is induced 3. Appearance of brown spot surrounded by chlorotic veins 4. Stomatal aperture closure takes place 20)Reaction carried out by N2 fixing microbes include 1.2NH3 + 3O2 → 2NO3

–– + 2H+ + 2H2O (i) 2. 2NO2

– + O2 → 2NO3– (ii)

Which of the following statements about these equations is not true 1. step (i) is carried out by Nitrosomonas or Nitrococcus

2. step (ii) is carried out by Nitrobacter

3. both steps (i) and (ii) can be called nitrification

4. bacteria carrying out these steps are usually photoautotrophs

21) With regard to the Biological Nitrogen Fixation by Rhizobium in association with soybean, which one of the following statement/ statements does not hold true. 1. Nitrogenase may require oxygen for its functioning. 2. Nitrogenase is MO- Fe protein 3. Leg-hemoglobin is a pink coloured pigment. 4. Nitrogenase helps to convert N2 gas into

two molecules of ammonia. 22.Match the element with its associated functions/roles and choose the correct option among given below

Options 1. A-i, B-ii, C-iii, D-iv, E-v 2. A-iv, B-i, C-iii, D-ii, E-v 3. A-iii, B-ii, C-iv, D-v, E-i 4. A-ii, B-iii, C-v, D-i, E-iv 23) Plants can be grown in (Tick the incorrect

option)

1. soil with essential nutrients. 2. water with essential nutrients. 3. either water or soil with essential nutrients.

4. water or soil without essential nutrients. 24) Name atleast three plants for which this technique can be employed for their commercial production

1. tomato,seedless cucumber, lettuce 2.tomato,radish,soyabean 3.lettuce,mentha, ginger 4.cucumber ( seedless), bitter guard, spinach 25) Excess of Mn may induce deficiency of – 1. B,N,K 2. Fe,Mg,Ca 3. Mn,Cl, Na 4. Zn,P,Mo 26) Lack or low level of which of following elements causing inhibition of cell division- 1. Ca,Mg,Cu,K 2. N,Fe, Mn, Zn 3. N,K,S, Mo 4. Cl, B,P,Si 27) Passive movement of ions into the apoplast usually occurs through ion channels- 1. the trans membrane proteins that function as selective pores. 2. entry or exit of ions require expenditure of metabolic energy, is usually called flux 3.entry and exit of ions through plasmadesmata is symplast 4. passive movement of ions do not follow specific channel 28) For protection of enzymes the nodule contains an oxygen scavenger called- 1. Carboxy –haemoglobin 2. Oxy-haemoglobin 3. Leg-haemoglobin 4. haemolymph 29) The enzyme nitrogenase catalyses the conversion of atmospheric nitrogen to ammonia due to- 1. Mo-Fe protein 2. Mo-P protein 3. Mo – Cu protein 4. Mo – S protein 30) See the presentation shown below and mark the amino acid which is responsible for transfer of amino group to keto group-

1. Glutamic acid 2.Aspartic acid

2. Isoleusine 4. Glycins