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TLS Online TPP Program

#Question id: 1427

 In females, all the cells in a tumor have the same inactive X chromosome. The reason for this is that:

#Unit 4. Cell Communication and Cell Signaling

  1. all of the cells in a tumor are derived from a single progenitor cell.

  2. all late-stage tumors have chromosome abnormalities.

  3. multiple mutations are required for tumor induction.

  4. many tumor-suppressor genes are on the X chromosome.

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TLS Online TPP Program

#Question id: 3646

#Unit 3. Fundamental Processes

Both leading and lagging strand primers are elongated by:
TLS Online TPP Program

#Question id: 24166

#General Aptitude

The term spices is a pleasant one, whether it connotes fine French cuisine or a down-home, cinnamon-flavored apple pie. ____________. In the past, individuals traveled the world seeking exotic spices for profit and, in searching, have changed the course of history. Indeed, to gain control of lands harboring new spices, nations have actually gone to war.
TLS Online TPP Program

#Question id: 8846

#Unit 9. Diversity of Life Forms

Why are hydrocarbons insoluble in water?
TLS Online TPP Program

#Question id: 323

#Unit 1. Molecules and their Interaction Relevant to Biology

When the atoms involved in a covalent bond have the same electronegativity, what type of bond results?
TLS Online TPP Program

#Question id: 10293

#Unit 6. System Physiology – Plant

the main glucose transporter in the cells of skeletal muscle, cardiac muscle, and adipose tissue, which is