Biological fixation of nitrogen most commonly occurs in which of the following crops?

With reference to the popular medicinal plant "guggal" (commiphora wightii), which of the following statements is/are correct?

1. It grows in the wild in the tropical rain forests of north-east India only.
2. The gum extract of the plant has the medicinal properties.
3. It helps in lowering the low-density lipoprotein cholesterol.

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Consider the following statements:

1. Higher levels of ozone concentrations in the ambient air aggravates the severity and frequency of symptoms among asthmatics.
2. A short term increase in particulate matter in the ambient air increases the chances of acute heart attacks.

Which of the statements given above is/are correct?

Holography has applications in which of the following?

1. Data storage
2. Prevention of counterfeiting
3. Destruction of cancerous cells
4. Detection of kidney stones

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Consider the following rivers:

1. Betwa
2. Chambal
3. Sone

Which of the above join river Yamuna?

It is known that the yellow pigment curcumin in turmeric powder helps the body cells to resist the infections. Recently, its exact action has been discovered. In this context which of the following statements is/are correct?

1. Curcumin stimulates the rapid multiplication of WBC that destroy the infectious microorganisms.
2. Curcumin molecules insert themselves into cell membranes and make the membranes resistant to invading microorganisms.
3. Curcumin stimulates the rapid synthesis of antibodies against the invading microorganisms.

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