Practice Questions

TLS Online TPP Program

#Question id: 9605

A phylogenetic tree that is ʺrootedʺ is one

#Unit 9. Diversity of Life Forms

that extends back to the origin of life on Earth.
at whose base is located the common ancestor of all taxa depicted on that tree.
that illustrates the rampant gene swapping that occurred early in lifeʹs history.
that indicates our uncertainty about the evolutionary relationships of the taxa depicted on the tree.

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TLS Online TPP Program

#Question id: 2652

#Unit 2. Cellular Organization

Which of these acts as an inducer of the lac operon?

TLS Online TPP Program

#Question id: 2653

#Unit 2. Cellular Organization

The sequence of the structural genes in the lac operon is

TLS Online TPP Program

#Question id: 2654

#Unit 2. Cellular Organization

Regulation of the lac operon can be envisioned as regulation of enzyme synthesis by its

TLS Online TPP Program

#Question id: 2655

#Unit 2. Cellular Organization

Lac Operon will be turned on when

TLS Online TPP Program

#Question id: 2656

#Unit 2. Cellular Organization

In a cell as per the Operon Concept, the regulator gene governs the chemical reactions by

TLS Online TPP Program

#Question id: 2921

#Unit 2. Cellular Organization

During which stage of the cell cycle is the chromosome content of a mammalian liver cell 1n?