Practice Questions

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

all of the cells in a tumor are derived from a single progenitor cell.
all late-stage tumors have chromosome abnormalities.
multiple mutations are required for tumor induction.
many tumor-suppressor genes are on the X chromosome.

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TLS Online TPP Program

#Question id: 4735

#Unit 8. Inheritance Biology

In corn, three dominant alleles, called A, C, and R, must be present to produce colored seeds. Genotype A/–; C/– ; R/– is colored; all others are colorless. A colored plant AaCCRr is crossed with colorless plant aaCcRr. What proportional of offspring plant with colorless seed?

TLS Online TPP Program

#Question id: 33309

#Unit 1. Molecules and their Interaction Relevant to Biology

Identify the plot shown

TLS Online TPP Program

#Question id: 12318

#Unit 10. Ecological Principles

The evolution of mating systems is most likely affected by

TLS Online TPP Program

#Question id: 20989

#Unit 12. Applied Biology

_______ conversion of toluene to benzoic acid in the zone of a crude oil-contaminated aquifer was obtained.