Question : The breaking up and decay of exposed rocks by temperature changes, frost action, plants, animals and human activity is called:

Option 1: Smelting

Option 2: Erosion

Option 3: Weathering

Option 4: Deforestation

Question : In normal cells, the process of the flow of genetic information from DNA to RNA is called:

Option 1: Translation

Option 2: Transportation

Option 3: Transcription

Option 4: Translocation

Question : The hydrophilic nature of DNA is due to the presence of:

Option 1: thymine base

Option 2: many hydrogen bonds

Option 3: phosphate group

Option 4: deoxyribose sugar

Question : The enzyme which catalyses the unwinding of DNA helix during replication is:

Option 1: Primase

Option 2: Topoisomerase

Option 3: Helicase

Option 4: DNA polymerase

Question : If $a^2+b^2+1=2 a$, then the value of $a^4+b^7$ is:

Option 1: 1

Option 2: 0

Option 3: 2

Option 4: 4