A nutritionally wild type organism, which does not require any additional growth supplement is known as:
1. Holotype
2. Auxotroph
3. Prototroph
4. Phenotype
Anabaena is associated with Azolla's:
1. Stem
2. Leaves
3. Roots
4. Flowers
Which of the following does not contain metal:
1. Glycoproteins
2. Ferritin
3. Cytochromes
4. Chromoproteins
Nitrogen-fixing bacteria converts:
1.
2.
3.
4.
Insectivorous plants grow in the soil which is deficient in:
1. Mg
2. Ca
3. P
4. N
When the plants are grown in magnesium-deficient but urea-rich soil, the symptoms expressed are:
1. Yellowish leaves
2. Colourless petiole
3. Dark green leaves
4. Shoot apex die
Plants take zinc in the form of:
1. ZnSO4 | 2. Zn2+ |
3. ZnO | 4. Zn |
An aquatic fern that is used to increase the yield of paddy crops:
1. Azolla
2. Salvinia
3. Marsilea
4. Isoetes
The major role of minor elements inside living organisms is to act as:
1. Co-factors of enzymes
2. Building blocks of important amino acids
3. Constituent of hormones
4. Binder of cell structure
Which element is located at the center of the porphyrin ring in chlorophyll?
1. | Calcium | 2. | Magnesium |
3. | Potassium | 4. | Manganese |