61.

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at that point. What is that sequence called?

• CAAT box

• GGTT box

• AAAT box

• TATA box

Three crops that contribute maximum to global food grain production are

• wheat, rice and maize

• wheat, maize and sorghum

• rice, maize and sorghum

• wheat, rice and barley

Genes for cytoplasmic male sterility in plants are generally located in

• mitochondrial genome

• cytosol

• chloroplast genome

• nuclear genome

Which one of the following hydrolysis internal phosphodiester bonds in a polynucleotide chain?

• Lipase

• Exonuclease

• Endonuclease

• Protease

The name of Norman Borlaug is associated with

• green revolution

• yellow revolution

• white revolution

• blue revolution

E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because

• in the presence of glucose, E. coli cells do not utilize lactose

• they cannot transport lactose from the medium into the cell

• the lac operon is constitutevely active in these cells

• they cannot synthesize functional $\mathrm{\beta }$- galactosidase

More than 70% of world's freshwater is contained in

• Antartica

• Glaciers and Mountains

• Greenland

• Polar ice

Which one of the following pairs is mismatched?

• Biomass burning - Release of CO₂

• Fossil fuel burning - Release of CO₂

• Nuclear power - Radioactive wastes

• Solar energy - Green house effect

Biodiversity act of India was passed by the Parliament in the year

• 1996

• 1992

• 2002

• 2000

Identify the correctly matched pair

• Montreal protocol - Global warming

• Kyoto protocol - Climatic change

• Ramsar convention - Ground water pollution

• Basal convention - Biodiversity conservation