1. Total number ATP required for the synthesis of 2NH3 by symbiotic nitrogen fixation are : (a) 12 (b) 14 (c) 16 (d) 18 (e) 22 2. Nitrogen fixing genes are : (a) nif (b) nod (c) fix (d) ferrodoxin (e) All except (d) are correct 3. Name the metabolic process by which reducing equivalents and ATP are supplied for nitrogen fixation and amino acid synthesis (a) Photosynthesis (b) Aerobic cellular respiration (c) Anaerobic cellular respiration (d) PPP (e) All except (c) are correct 4. In reductive amination, name the keto acid to which ammonia is added for synthesizing an amino acid (a) Pyruvic acid (b) OAA (c) a-Keto glutaric acid (d) Glyoxylate (e) All the above 5. What is the similarity between chromatium, Rhodospirillum and Rhodopseudomonas (a) All are facultative anaerobic nitrogen fixers (b) All are chemosynthetic nitrogen fixers (c) All are photosynthetic nitrogen fixers (d) All are facultative saprobic nitrogen fixers (e) None of these 6. ------is formed when hydroxyl parts of the amino acids like glutamic acid and aspartic acid are replace by another NH2 radicle (a) Amino acid (b) Keto acid (c) Amides (d) Peptide (e) Protein 7. The major part of dry weight of plants is formed by the elements obtained from (a) Air (b) Water (c) Soil (d) a & b are correct (e) Outer space 8. A nitrogen fixing fungus is (a) Albugo (b) Pullularia (c) Amanita (d) Pleurotus (e) Phyllachora 9. Bidirectional translocation of minerals takes place through (a) Parenchyma (b) Xylem (c) Phloem (d) Cambium (e) Sclerenchyma 10. The following are features of an element in the above plants : 1. Components of cysteine 2. Constituents of coenzyme A, thiamine and Biotin 3. Deficiency leads to chlorosis (a) Mg (b) N (c) B (d) Mn (e) S 11. Select the true statement : (1) Intake of a nutrient into the intercellular space and cell wall require metabolic energy (2) Intake of a nutrient in to the cytoplasm and vacuole require metabolic energy (3) The movement of the ions into the cell is termed as influx (a) All except 1 are correct (b) All except 2 are correct (c) All except 3 are correct (d) All are correct (e) All wrong 12. The following list includes the enzymes involved in the nitrogen metabolism. Find out the correct sequence of enzyme with respect to their function : (1) Nitrate reductase (2) Nitrogenase (3) Nitrite reductase (4) Reductive aminase (5) Transaminase (a) 2,5,4,1,3 (b) 2,4,5,3,1 (c) 2,1,3,4,5 (d) 2,1,3,5,4 (e) 2,4,5,3,1 13. Nitrogen deficiency leads to the following symptoms in plants : (1) Dormancy of lateral bud, Late flowering (2) Chlorosis (3) Purple colouration of shoot axis (4) Wrinkling of cereal grains (5) Necrosis (a) All correct (b) All except 1 are correct (c) All except 3 are correct (d) All except 4 are correct (e) All except 5 are correct 14. Name the group in which the following organism are placed, (1) Organism that uses inorganic nutrients as a source of energy and CO2 as source of carbon will come under the group (2) The organism is unable to use CO2 as its sole source of carbon and require one or organic compounds from autotrophs will come under the group (a) 1-heterotrophs, 2-autotrops (b) 1-autotrophs, 2-heterotrops (c) 1-photoorganotrophs, 2-photolitholtrops (d) 1 & 2 are autotrops (e) 1-Chemo auototrophs 2-chemoorganotrophs 15. Choose the correct sequence of root nodule formation in leguminous plant : (1) Formation of Bacteriods and infection thread (2) Inner cortex and pericycle under division (3) Rizobium associate with susceptible root hair (4) Curling of root hair or deformation of root hair (5) Production of cytokinin and Auxin by Bacteria and plant cell respectively (6) Formation of vasuclar tissues inside root nodules (a) 5,4,2,3,1,6 (b) 3,4,1,5,2,6 (c) 3,4,1,2,5,6 (d) 1,3,5,2,4,6 (e) 3,2,4,5,1,6 16. In plants, a common symptom caused by the deficiencies of P, K, Ca and Mg is the (a) Bending of leaf tips in the form of hooks (b) Formation of anthocyanin pigment in abundance (c) Appearance of deep necrotic areas on the leaves (d) Poor development of vasculature in the stem (e) Exanthema 17. Cytochrome oxidase contains (a) Co (b) Mg (c) Fe (d) Hg (e) Ni 18. In an experiment a plant is dried, placed in a crucible and strongly heated in air for a long time. The residue is composed of (a) The oxides or carbonates of about 10 elements (b) Carbon (c) The oxides and carbonates of three elements (d) Starch (e) Iron 19. The first symptom of chlorosis in Mg deficiency is (a) Young leaves fall down first followed by old leaves (b) Old leaves droop down followed by young leaves (c) Falling of leaves (d) Exanthema (e) None of these 20. ‘Khaira disease of rice’ is the consequence of deficiency of (a) Boron (b) Zinc (c) Magnesium (d) Copper (e) All of these Key 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 D E E C C C C B C E A C E B B D C A B B
Description
Plants are photosynthetic autotrophs that can produce all the
organic compounds they need from carbon dioxide, water, and
minerals, including a nitrogen source. They obtain energy from
sunlight, carbon dioxide from the atmosphere, and nitrogen containing
ions and mineral nutrients from the soil.
Plants explore their surroundings by growing rather than by
movement.Mineral Nutrients Essential to Plants Plants require 14 essential mineral elements, all of which
come from the soil solution. Several of these essential elements
fulfill multiple roles. The six mineral nutrients required in substantial amounts are called macronutrients; the eight required in much smaller
amounts are called micronutrien