Read the following statements regarding cloning vectors and select the correct option.

Statement I: Antibiotic resistance markers are essential for an expression vector but not necessary for a standard cloning vector.

Statement II: The presence of an antibiotic resistance gene allows transformed bacteria to survive on media containing the corresponding antibiotic.

#Question id: 40482

#Applied Microbiology

 Which international treaty was signed specifically to control the emission of Ozone Depleting Substances (ODS) like CFCs?

#Question id: 40483

#Applied Microbiology

While HFCs (Hydrofluorocarbons) were introduced to replace CFCs because they do not deplete the ozone layer, they are still problematic. Why?

#Question id: 40484

#Applied Microbiology

Read the following statements regarding the breakdown of the ozone layer:

Statement I: UV radiation acts upon Chlorofluorocarbons (CFCs) in the stratosphere to release active Chloride radicals.

Statement II: A single Chlorine radical is consumed after destroying one Ozone molecule and cannot participate in further reactions.

Which of the options is correct?

#Question id: 40485

#Applied Microbiology

 Consider the following statements about the "Ozone Hole":

1. It is most prominent over the Antarctica region.

2. It forms primarily during the late winter and early spring.

3. The formation of Polar Stratospheric Clouds (PSCs) facilitates the depletion process.

Which of the statements given above are correct?

#Question id: 40486

#Applied Microbiology

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The thickness of the ozone layer is measured in Dobson Units (DU).

Reason (R): The ozone layer is found in the Troposphere and protects us from harmful UV-B radiation.

#Question id: 40487

#Applied Microbiology

Match the Chemical/Term (List I) with its description or impact (List II).