The criteria for essentiality of an element for a plant include all except:
0%
a) It must be absolutely necessary for supporting normal growth and reproduction.
0%
b) The requirement must be specific and not replaceable by another element
0%
c) It must be directly involved in the metabolism of the plant.
100%
d) They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.
Q.3.
Yellowing of leaves is called
0%
a) Tylosis
100%
b) Chlorosis
0%
c) Necrosis
0%
d) Florosis
Q.4.
Which element is necessary to stabilize ribosomes ?
50%
a) Mn
50%
b) Mg
0%
c) Mo
0%
d) Ni
Q.5.
Due to which element deficiency bark of tree becomes rough and gets split and exudes gum-like secretion ?
0%
a) Zn
0%
b) K
100%
c) P
0%
d) Cu
Q.6.
According to mass flow principle what is responsible for absorption of water ?
67%
a) Transpiration
0%
b) Turgidity
33%
c) Osmotic pressure
0%
d) Turgor pressure
Q.7.
Formation of NO2 and NO3 from NH3 is indentified by which name ?
25%
a) Nitration
25%
b) Denitrification
25%
c) Nitrogenation
25%
d) Nitrification
Q.8.
Which element is necessary for meristmatic tissue and differentiating tissues ?
50%
a) Fe
0%
b) N
50%
c) Ca
0%
d) B
Q.9.
Which one is correct option for Column I and Column II
Column I
Column II
1 Diffusion
(i) Suction pressure
2 Ion exchange
(ii)expenditure of metabollic energy
3 Donnan Equillibrium
(iii) Cell wall
4 Principle of Mass flow
(iv)ion channels
5 Active absorption
(v) plasma membrace
0%
a) 1 - iv, 2 - iii, 3 - v, 4 - i, 5 - ii
50%
b) 1 - ii, 2 - iii, 3 - iv, 4 - v, 5 - i
0%
c) 1 - iv, 2 - iii, 3 - v, 4 - ii, 5 - i
50%
d) 1 - v, 2 - i, 3 - ii, 4 - iii, 5 - iv
Q.10.
From the given statements for transport of mineral elements which are correct one ? (i) Transport of mineral ions takes place by symplastic and Apoplastic path. (ii) Mineral ions absorbed by roots first enters in the cortex then through pericycle and endoder mis enters into xylem units. (iii) Water and mineral ion transpotation are interlinked with each other. (iv) Transport of mineral elements in xylem takes place with water only.
0%
a) i, ii and iii
0%
b) i, iii and iv
0%
c) ii, iii and iv
0%
d) i and ii
Q.11.
The region within the plasma membrane and within the vacuole is called ?
0%
a) nucleus membrane region
0%
b) passive transport region
0%
c) Cellular region
0%
d) Active transport region
Q.12.
Find out the correct option from the given statements for ion exchange. (i) Anion and cations are located on the surface of cell wall through their absorption. (ii) The soil solutions also contains ions. (iii) Carrier molecules are involved in ion exchange & energy is consumed from ATP. (iv) Such ionic exchange occurs even against their concentration - gradient.
0%
a) iii and iv
0%
b) i, ii and iii
0%
c) i, ii and iv
0%
d) ii, iii and iv
Q.13.
Which is correct statement for Active transport ?
0%
a) It occurs in the concentration gradient so ATP is not required.
100%
b) It occurs in the concentration gradient so ATP is required.
0%
c) It occurs against the concentration gradient so ATP is not required.
0%
d) It occurs against the concentration gradient so ATP is required.
Q.14.
By which nitrite is converted into nitrate ?
0%
a) Nitro bacter
0%
b) Nitro somonas
0%
c) Agro bacterium
0%
d) Psuedomonas
Q.15.
Genes related to nodule formation are present in:
0%
a) Legume plants and Nostoc.
0%
b) Legume plants and Rhizobium.
0%
c) Legume plants only.
0%
d) Rhizobium only.
Q.16.
Premature fall of leaves and buds is a mineral deficiency symptom occurring in the region where the soil is deficient in:
0%
a) Phosphorus.
0%
b) Potassium.
0%
c) Boron.
0%
d) Nitrogen.
Q.17.
In leguminous plants, curling of root hairs is stimulated by polysaccharides found on the surface of Rhizobium recognised by:
0%
a) Lipopolysaccharide of host plant.
0%
b) Lipopolysaccharide of bacteria.
0%
c) Lectins, proteins of host plant root.
0%
d) Lectins, proteins of bacteria.
Q.18.
Which of the following statements is not correct?
0%
a) Nitrogenase is exclusively present in prokaryotes
0%
b) Blue green algae and lichens are diazotrophs.
0%
c) Nitrogen fixing bacteria are always symbiotic.
0%
d) Nitrate assimilation in the plant body means conversion of NH3 to NO3-.
Q.19.
Assertion: In hydroponics, the nutrient solution must be adequately aerated. Reason: This ensures the proper growth of contaminated algae.
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
0%
b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
0%
c) Assertion is true but Reason is false.
0%
d) Both Assertion and Reason are false.
Q.20.
Choose the correct statement with regards to mineral elements in plants:
0%
a) There is a narrow range of concentration at which microelements are optimum.
0%
b) Moderate increase in macro-elements causes toxicity.
0%
c) The prominent symptom of manganese toxicity is the appearance of green spots surrounded to chlorotic veins.
0%
d) Excess manganese promotes calcium translocation in shoot apex.
Q.21.
Sulphur is an important nutrient for optimum growth and productivity in:
0%
a) Fibre crop.
0%
b) Oil seeds crop.
0%
c) Pulse crops.
0%
d) Cereals.
Q.22.
Which of the following is wrong about the macro-element – Nitrogen?
0%
a) It is a major constituent of proteins, nucleic acids, vitamins and hormones.
0%
b) It is required by the plants in the greatest amount.
0%
c) It is absorbed mainly as NO2- and NH4+ by the plants though some are also taken as NO3¯.
0%
d) It is required by all plant parts, particularly the meristematic tissues and metabolically active cells.
Q.23.
Read the following statements: (i) During N2 fixation, reduction of one molecule of nitrogen into two molecules of ammonia consumes 16 ATP molecules. (ii) Denitrification can be considered as opposite to nitrogen fixation. (iii) Alnus, Casuarina and Myrica are non legumes which form root nodules with the help of Rhizobium. (iv) Leg haemoglobin is a Fe – Mo protein. (v) Insectivorous plants grow in soil deficit in nitrates. Which of the following statements are true:
0%
a) (i), (ii), (iv).
0%
b) (i) and (ii) only.
0%
c) (iii), (iv), (v).
0%
d) (i), (iii), (iv), (v).
Q.24.
Count the number of correct statements from the following: (i) In Soybeans fixed N2 exported as ureides. (ii) Ureides have high nitrogen to carbon ratio. (iii) Transamination involves the transfer of an amino group from one amino acid to the keto group of a keto acid. (iv) First Transamination product is aspartic acid.
0%
a) 3
0%
b) 2
0%
c) 4
0%
d) 1
Q.25.
The different steps in nodule formation are given below: (i) A mature nodule establish a direct vascular connection with the host for exchange of nutrients. (ii) Root hair curls and bacteria invade the root hair. (iii) Rhizobium bacteria contact a susceptible root hair divide near it. (iv) The infection thread is produced carrying the bacteria and grows into the cortex of the root. (v) The bacteria yet modified into rod- shaped baterioids and cause inner cortical layer and pericycle todivide and form nodule. The correct sequence is:
0%
a) (i) → (ii) → (iv) → (v) → (iii).
0%
b) (iii) → (ii) → (iv) → (v) → (i).
0%
c) (iii) → (ii) → (iv) → (i) → (v).
0%
d) (i) → (iii) → (v) → (ii) → (iv).
Q.26.
Which one of the following statement is false:
0%
a) The deficiency symptoms tend to appear first in older leaves whenever the elemis are relatively immobile.
0%
b) The mobile elements are N, K and Mg and their symptoms first appear in older leaves.
0%
c) Most of the minerals can be absorbed by plants through active transport.
0%
d) Decomposition of organic nitrogen of dead plants and animals into ammonia called Ammonification.
Q.27.
Along with Na+ and K+, it helps in determining the solute concentration and the anion cation balance in cells. Which is this element?
0%
a) Zinc.
0%
b) Chlorine.
0%
c) Manganese.
0%
d) Boron.
Q.28.
The enzyme which is capable of nitrogen reduction present exclusively in prokaryotes is:
0%
a) Nitrogenase.
0%
b) Nitrogen reductase.
0%
c) Carboxylase.
0%
d) Glutamate dehydrogenase.
Q.29.
Plants need one of the following for ATP formation:
0%
a) N, P.
0%
b) N, K.
0%
c) Na, K
0%
d) N, Mg.
Q.30.
Free living aerobic nitrogen fixing microbes are:
0%
a) Rhizobium and Nostoc
0%
b) Azotobacter and Beijernickia
0%
c) Rhodospirillum and Oscillatoria.
0%
d) Anabaena and Glomus.
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