Mineral Nutrition

Assertion : Plants absorb sulphur in the form of sulphate ions.

Reason : Sulphur bacteria are required for the formation of sulphate.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Which of the following sugars is not plants?

• sucrose

• glucose

• lactose

• fructose

Nitrogen-fixation in root nodules of Alnus is brought about by

• Bradyrhizobium

• Clostridium

• Frankia

• Frankia

Which of the following is a symbiotic nitrogen fixer?

• Glomus

• Azotobacter

• Frankia

• Frankia

The "Repeating Unit" of glycogen is

• fructose

• mannose

• glucose

• galactose

Which one of the following is not a microelement for plants?

• Cu

• B

• Zn

• Cr

Which of the following is used as a best genetic vector in plants?

• Bacillus thurengiensis

• Agrobacterium tumifaciens

• Pseudomonas putida

• All of the above

The two subunits of ribosome remain united at a critical ion level of

• Copper

• Manganese

• Manganese

• Manganese

Manganese is required in 

• nucleic acid synthesis

• plant cell wall formation

• photolysis of water during photosynthesis

• photolysis of water during photosynthesis

Nif genes occur in

• Rhizobium 

• Aspergillus

• Penicillium

• Streptococcus