Subject Experts Solutions for Exercise 4: Assertion & Reason

Assertion : The uptake of DNA during transformation is an active, energy requiring process.

Reason : Transformation occurs in only those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.

Assertion : In prokaryotes, there are three initiation factors used for protein synthesis.

Reason : All the initiation factors have their own functions.

Assertion: The bacteria and other prokaryotes show high adaptability to the changing environment.

Reason: Members of kingdom Monera are efficient in regulating gene expression.

Assertion : DNA found in mitochondria and chloroplast are called prochromosome.

Reason : They are similar to prokaryotic chromosome.

Assertion : Killer strain of Paramecium aurelia can kill sensitive strain.

Reason : If sensitive strain is provided kappa particle, it becomes killer.

Assertion : Scaffold proteins are nonhistone chromosomal proteins.

Reason : They are rich in lysine and arginine.

Assertion : RNA produced during transcription in eukaryotic cells cannot be straight away used in photosynthesis.

Reason : RNA splicing phenomena helps in the removal of exons.

Assertion : Recognition site should be preferably single and responsive to commonly used restriction enzyme.

Reason : In pBR $322$ alien DNA is ligated generally in the area of Bam-$HI$ site of tetracycline resistance gene.