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 |
Which one of the following mineral elements plays an important role in biological nitrogen fixation:
1. Copper
2. Manganese
3. Zinc
4. Molybdenum
Boron in green plants assists in:
1. Activation of enzymes
2. Acting of enzyme cofactor
3. Photosynthesis
4. Sugar transport
Enzyme first used for nitrogen fixation:
1. Nitrogenase
2. Nitroreductase
3. Transferase
4. Transaminase
Cytochrome is:
1. Metallo flavo protein
2. Fe containing porphyrin pigment
3. Glycoprotein
4. Lipid
Roots of which plant contains a pink pigment that has an affinity for oxygen:
1. Carrot
2. Soyabean
3. Mustard
4. Radish
Plants take zinc in the form of:
1. ZnSO4 | 2. Zn2+ |
3. ZnO | 4. Zn |
Nitrogen-fixing bacteria converts:
1.
2.
3.
4.
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 |