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Biotechnology and Its Applications

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

• Frequent irrigation of the crop

• Treatment of the plants with cytokinins alongwith a small dose of nitrogenous fertilizer

• Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid

• Application of iron and magnesium to promote synthesis of chlorophyll

D.

Application of iron and magnesium to promote synthesis of chlorophyll

If a pulse crop possesses premature yellowing of leaves and decrease in yield and application of magnesium and iron to promote synthesis of chlorophyll may become most beneficial to overcome the problem and to obtain maximum seed yield.
Magnesium is an important part of ring structure of chlorophyll molecule and its deficiency causes chlorosis and premature leaf abscission.
In iron deficiency also, the leaves become chlorotic because iron is required for the synthesis of some of the chlorophyll protein complexes in the chloroplast.

If a pulse crop possesses premature yellowing of leaves and decrease in yield and application of magnesium and iron to promote synthesis of chlorophyll may become most beneficial to overcome the problem and to obtain maximum seed yield.
Magnesium is an important part of ring structure of chlorophyll molecule and its deficiency causes chlorosis and premature leaf abscission.
In iron deficiency also, the leaves become chlorotic because iron is required for the synthesis of some of the chlorophyll protein complexes in the chloroplast.

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What is transgenic organism ?

An organism which carries a foreign functional gene in its genome is termed transgenic organism.
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Write two applications of biotechnology.

Two application of Biotechnology are

1. Treatment of diseases.

2. Production of genetically modified plants and animals.

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Name two diseases that can be treated by producing biological compound in transgenic animal.

Two diseases that can be treated by producing biological compond in transgenic animal are -
1. Emphysema.
2. Cystic fibrosis.
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What are probes ?

It is a single stranded DNA or RNA, tagged with a radioactive molecule, which hybridises with the  complementary  DNA and aids in detection of specific DNA sequences  by autoradiagraphy.
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What are transgenic animals ?

Animals whose DNA has been manipulated to possess and express an extra/foreign gene, are known as transgenic animals.
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