Roots of which plant contains a pink pigment that has an affinity for oxygen:
1. Carrot
2. Soyabean
3. Mustard
4. Radish
Cytochrome is:
1. Metallo flavo protein
2. Fe containing porphyrin pigment
3. Glycoprotein
4. Lipid
Enzyme first used for nitrogen fixation:
1. Nitrogenase
2. Nitroreductase
3. Transferase
4. Transaminase
Match Column-I with Column- II.
Column I | Column II | ||
(a) | Nitrococcus | (i) | Denitrification |
(b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
(c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
(d) | Nitrobactèr | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below:
Options: | (a) | (b) | (c) | (d) |
1. | iii | i | iv | ii |
2. | iv | iii | ii | i |
3. | ii | iv | i | iii |
4. | i | ii | iii | iv |
Boron in green plants assists in:
1. Activation of enzymes
2. Acting of enzyme cofactor
3. Photosynthesis
4. Sugar transport
Which one of the following mineral elements plays an important role in biological nitrogen fixation:
1. Copper
2. Manganese
3. Zinc
4. Molybdenum
Which element is located at the center of the porphyrin ring in chlorophyll?
1. | Calcium | 2. | Magnesium |
3. | Potassium | 4. | Manganese |
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
Plants take zinc in the form of:
1. ZnSO4 | 2. Zn2+ |
3. ZnO | 4. Zn |
Nitrogen-fixing bacteria converts:
1.
2.
3.
4.