About how long ago was the earth formed

• 3 billion years ago

• 10 billion years ago

• 4.6 billion years ago

• 20 billion years ago

Which of the following T-cells and destroyed by HIV?

• Cytotoxic T-cells

• Killer T-cells

• Suppressor T-cells

• Helper T-cells

Continuous exposer to vinyl chloride may cause cancer of the

• Liver

• spleen

• vagina

• Prostate gland

Who received Nobel Prize in 1951 for the development of a vaccine for yellow fever?

• Max Theiler

• Ronald Ross

• Max Delbruck

• Francis Peyton Rous

An autoimmune disease is

• AIDS

• haemophilia

• Allergy

• Myasthenia Gravis

Which of the following is the Pribnow box?

• 5′-TATAAT-3′

• 5′-TAATAT-3′

• 5′-AATAAT-3

• 5′-ATATTA-3′

Jut is a

• bast fibre from secondary xylem

• bast fibre from primary xylem

• bast fibre from secondary phloem

• bast fibre from primary phloem

The plant whose seeds are known to leave the longest viability period is

• Carica papaya

• Triticum aestivum

• Zizypus mauritiana

• Nelumbo nucifera

Gas gangrene is caused by

• Clostridium botulinum

• Xanthomonas campestris

• Pseudomonas

• Clostridium perfringens

The genome of Caenorhabditis elegans consists of

• 3 billion base pairs and 30,000 genes

• 12 million base pairs and 6000 genes

• 4.7 million base pairs and 4000 genes

• 97 million base pairs and 18,000 genes