Question

The deficiencies of micronutrients, not only affects growth of plants, but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which
group of three elements shall affect most, both photosynthetic and mitochondrial electron transport -

• A. $Cu,Mn,Fe$
• B. $Co,Ni,Mo$
• C. $MnCo,Ca$
• D. $Ca,K,Na$

Answer 1

The correct option is A $Cu,Mn,Fe$

$Cu,Mn$ and $Fe$ affect both photosynthetic and mitochondrial electron transport.
Manganese is essential for the activity of enzymes of Kreb cycle. The enzyme is required in photosynthetic oxygen evolution.
Iron is the component of cytochromes and non-heme iron proteins of photosynthesis and respiration.
Copper is component of enzymes of redox reactions of electron oxidative phosphorylation and photophosphorylation.

So, the correct answer is option 'a'.