1. | Bradyrhizobium | 2. | Clostridium |
3. | Frankia | 4. | Azorhizobium |
1. | Gastric juice will be deficient in chymosin |
2. | Gastric juice will be deficient in pepsinogen |
3. | In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin |
4. | Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin |
1. cytochrome-b
2. cytochrome-f
3. quinone
4. ferredoxin
1. bioremediation of contaminated soils
2. reclamation of wastelands
3. gene transfer in higher plants
4. biological control of soil-borne plant pathogens
1. Neutrophils
2. Basophils
3. Eosinophils
4. Monocytes
1. | Scales on their hind limbs |
2. | Four-chambered heart |
3. | Two special chambers crop and gizzard in their digestive tract |
4. | Eggs with a calcareous shell |
1. primary spermatocytes
2. secondary spermatocytes
3. spermatids
4. spermatogonia
1. | The total amount of purine nucleotides and pyrimidine nucleotides is not always equal |
2. | There are two strands, which run parallel in the 5' → 3’ direction |
3. | The proportion of adenine in relation to thymine varies with the organism |
4. | There are two strands, which run antiparallel - one in 5' → 3’ direction and the other in 3’→ 5’ |
Consider the following four measures (A.D) that could be taken to successfully grow chickpeas in an area where bacterial blight disease is common:
(A) | spray with Bordeaux mixture |
(B) | control of the insect vector of the disease pathogen |
(C) | use of only disease-free seeds |
(D) | use of varieties resistant to the disease |
Which two of the above measures can control the disease?
1. B and C
2. A and B
3. C and D
4. A and D