MCQ
Recombinant DNA technology developed during:
- A1970s
- B1980s
- C1990s
- D2000s
Explanation:
DNA technology is the way in which genetic material from one organism is artificially introduced into the genome of another organism and then replicated and expressed by other organism. It was advanced by the collaboration of stanley cohen and Herbert Boyer in 1972.
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| | Bacterium | | Product |
| i. | Aspergillus niger | a. | Lactic acid |
| ii. | Acetobacter aceti | b. | Butyric acid |
| iii. | Clostridium butylicum | c. | Acetic acid |
| iv. | Lactobacillus | d. | Citric acid |
$A$. The flowers of Vallisneria are colourful and produce nectar.
$B$. The flowers of water lily are not pollinated by water.
$C$. In most of water-pollinated species, the pollen grains are protected from wetting.
$D$. Pollen grains of some hydrophytes are long and ribbon like.
$E$. In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.