51. Which is proper pair of ions and its deficiency symtoms ?
A. Nitrogen - Induction of dormancy
B. Potassium - Scorched look to leaves
C. Phosphorous - Chlorosis
D. Zinc - Brown spoted of fruit
Answer : Option B
Which is correct for absorption of mineral ions, from the given statement ? select proper option.
(i) Elements absorbed by root cells first enters region between cell wall and plasma membrance.
(ii) It also enters in the inter cellular space of root cells.
(iii) This process occurs rapidly through transportation and requires energy obtained from ATP.
(iv) Later on mineral ions enters inside plasma membrance and vacuolar sap.
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.
Which statement is correct option from the given statements for plasma membrance ?
(i) The inner region of plasma membrane is the region within the vacuole.
(ii) For ionic absorption various ionic channels are located in the plasma membrance.
(iii) In Donnan equillibrium, only positive ions occurs on the inner surface of plasma membrance
55. Choose in correct pair.
A. Pulses - Nostoc
B. Nitrogenase - iron & molybdenum containing protein.
C. leghemoglobin - Oxygen carries protein.
D. FAD - Floride Adenine Dinucleotide.
Answer : Option C
56. Which is correct statement for Active transport ?
A. It occurs in the concentration gradient so ATP is not required
B. It occurs in the concentration gradient so ATP is required.
C. It occurs against the concentration gradient so ATP is not required.
D. It occurs against the concentration gradient so ATP is required.
Answer : Option D
57. Which is the true statement for the vanadium element ?
A. deficiency do not regulate the size of stomata.
B. It is united in the formation of bipolar spindle during cell division.
C. plant do not get ammonia from the soil, due to its deficiency.
D. It plays role as structural component of vitamin Biotin and thiamin.
Answer : Option C
58. Of the following, S is essential for best production of which crop ?
59. By which nitrite is converted into nitrate ?
60. In which form Phosphorous is absorbed from soil ?