Which of the following causes an increase in the intensity of UV radiation reaching the Earth? 

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#Question id: 13192

#Unit 10. Ecological Principles

In the schematic below, the left panel represents climatic zones occupied by two different biomes, X and Y, along gradients of temperature and precipitation. The right panel depicts the expected species-area relationships of these two biomes. From the figures below, which of the following are most likely to be true?

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#Question id: 13193

#Unit 1. Molecules and their Interaction Relevant to Biology

Data, collected from DNAs of a great many different species, led Chargaff to the following conclusions:

A. The base composition of DNA generally varies from one species to another.

B. DNA specimens isolated from different tissues of the same species have the different base composition.

C. The base composition of DNA in a given species changes with an organism’s age, nutritional state, or changing environment.

D. In all cellular DNAs, the sum of the purine residues equals the sum of the pyrimidine residues.

Which of the above statements are INCORRECT regarding Chargaff’s rule?

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#Question id: 13194

#Unit 1. Molecules and their Interaction Relevant to Biology

If we have the sequence 5’-ATGTC-3’ on one chain, the opposite chain must have the complementary sequence 

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#Question id: 13195

#Unit 1. Molecules and their Interaction Relevant to Biology

Who contributes to the stability of DNA helix structure?

A. Hydrogen bonding between bases

B. Hydrogen bonding between water and bases

C. Scattering interactions between bases

D. Stacking interactions between bases

CORRECT combination is

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#Question id: 13196

#Unit 1. Molecules and their Interaction Relevant to Biology

 In The Mica Experiment Dnase I enzyme cleaves 

TLS Online TPP Program

#Question id: 13197

#Unit 1. Molecules and their Interaction Relevant to Biology

In helical nature of DNA is its periodicity each base pair is displaced (twisted) from the previous one by