Which of the following is a commercial blood cholesterol lowering agent?

• Statin

• Streptokinase

• Lipases

• Cyclosporin A

Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.

• The enzyme binds DNA at specific sites and cuts only one of the two strands.

• The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

• The enzyme recognizes a specific palindromic nucleotide sequence in the DNA.

• The enzyme cuts DNA molecule at identified position within the DNA.

Which of the following sexually transmitted diseases is not completely curable?

• Genital warts

• Genital herpes

• Chlamydiasis

• Gonorrhoea

How does steroid hormone influence the cellular activities?

• Binding to DNA and forming a gene-hormone complex

• Activating cyclic AMP located on the cell membrane

• Using aquaporin channels as second messenger

• Changing the permeability of the cell membrane

75.

Which of these following methods is the most suitable for disposal of nuclear waste?

• Bury the waste under Antarctic ice-cover

• Dump the waste within rocks under deep ocean

• Bury the waste within rocks deep below the Earth's surface

• Shoot the waste into space

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

• Zygote develops into embryo

• Central cell develops into endosperm

• Ovules develop into embryo sac

• Ovary develops into fruit

What is the fate of the male gametes discharged in the synergid?

• All fuse with the egg

• One fuses with the egg, other(s) fuse(s) with synergid nucleus.

• One fuses with the egg and other fuses with central cell nuclei.

• One fuses with egg other(s) degenerate (s) in the synergid.

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

• Genetic code is redundant

• Genetic code is nearly universal

• Genetic code is specific

• Genetic code is not ambiguous

In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as

• Parthenocarpy

• Syngamy

• Parthenogenesis

• Autogamy

Which of the following ecological pyramids is generally inverted?

• Pyramid of energy

• Pyramid of biomass in a forest

• Pyramid of biomass in a sea

• Pyramid of numbers in grassland