Question

Horizontal gene transfer is extensive and occurs between species and domains. It is generally accepted that genes classified as “informational” are subject only to ______________, while those that are classified as _______________ are less constrained.

Question 14 options:

A)	Horizontal transfer/operational

B)	Vertical transfer/essential

C)	Vertical transfer/operational

D)	Selection/mutants

E)	Horizontal transfer/essential

Answer 1

Answer is C.

Horizontal transfer refers to the transfer of genes between different bacteria or other organisms via methods other than reproduction. Normally HGT is done through tranduction, transformation and conjugation.

Informational genes are those gene which are related to transcription, translation and replication. These are typically members of large complex gene as a result they cannot be transferred horizontally. So these informational genes are normally transfered through vertical transferred via offsprings.

Whereas operational genes are smaller ones reltively, and are more susceptible for HGT. example : antibiotic resistance genes etc. So they are less constrained and can move in HGT.

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