part 2

Question 1

magnesium

Answer 1

essential for binding components of ribosomes

absorbed in the form of divalent Mg2+. forms part of the chlorophyll molecule

Question 2

magnesium’s deficiency symptoms

Answer 2

1. interveinal chlorosis with purple anthocyanin pigmentation
2. chlorotic areas may turn necrotic

Question 3

sulphur

Answer 3

constituents of amino acids: cysteine and methionine

present in coenzyme A, vitamins(thiamine and biotin)

Question 4

sulphur’s deficiency symptoms

Answer 4

1. chlorosis

2. reduced nodulations in legumes

Question 5

iron

Answer 5

1. imp. constituent of proteins involved in the transfer of e- like ferredoxin and cytochrome
2. reversibly oxidized from Fe3+ to Fe2+ during e- transfer
3. activates catalase enzyme

Question 6

iron deficiency sysmptoms

Answer 6

interveinal chlorosis in the young leaves

Question 7

manganese and its deficiency symptoms

Answer 7

1. activates enzyme of respiration, photosynthesis and nitrogen metabolism
   deficiency: 1. causes grey peck of oat
2. marsh spot disease of pea

Question 8

molybdenum and its deficiency symptoms

Answer 8

required for nitrogen fixation and activates nitrate enzyme reductase
deficiency: 1. mottled chlorosis with marginal necrosis
2, abscission of flowers