Give reasons for
(i) Both strands of DNA are not copied during transcription.
(ii) Transcription and translation in bacteria can be coupled.

Give reason for - (i) Both strands of DNA are not copied during transcription. (ii) Transcription and translation in bacteria can be coupled.

Go through the following statements (i) 2'-OH group present at every nucleotide in RNA makes RNA labile and easily degradable. (ii) The transcription and translation can be coupled in bacteria (iii) the promoter is located towards the 5'-end while terminator is located towards the 3'end of the template strand. (iv). In lac operon, the z gene codes for betagalactosidase, y gene codes for permease while i gene codes for the inducer. Which of these are correct statement:

Give reason : (i)Boron is used as control rods in nuclear reactor. (ii) Graphite is soft and slippery.

Give reason: (i) Methyl amine is soluble in water but not in aniline. (ii) Methyl amine is more basic than ammonia.

Give reasons : (i) Actinoids show variable oxidation states. (ii) Zr and Hf have almost identical radii.

Give an example for the following properties of amines. (i) Coupling reaction. (ii) Carbyl amine reaction.

Give reasons: i) Actinoids show variable oxidation state. ii) Zr and Hfhave almost identical radii.

Study the diagram and answer the questions the follow it : (i) Which defect of vision is represented in the case ? Give reason for your answer. (ii) What could be two causes of this defect ? (iii) With the help of a diagram show how this defect can be corrected by the use of a suitable lens.