TLS Online TPP Program

#Question id: 12603


As big as it is, the ocean is nutrient-limited. If you wanted to investigate this, one reasonable avenue would be to

#Unit 10. Ecological Principles
  1. Follow whale migrations in order to determine where most nutrients are.
  2. Observe Antarctic Ocean productivity from year to year to see if it changes.
  3. Experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas. 
  4. Compare nutrient concentrations between the photic zone and the benthic zone in various locations
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TLS Online TPP Program

#Question id: 1536

#Unit 4. Cell Communication and Cell Signaling

Use the following figure to answer the question. According to figure, which of the following statement is incorrect?

TLS Online TPP Program

#Question id: 1535

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to cancer stem cell (CSCs).

a. A representative subpopulation of cancer cells with peculiar molecular aspects that resemble some of those typical of normal stem cells.

b. These cells are capable of replenishing the repertoire of identical cancer cells.

c. These cells cannot create heterogeneous progeny that differentiate into more mature cells.

d. These cells show extraordinary proliferative potential.

e. These cells show excessive programmed cell death.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 1534

#Unit 4. Cell Communication and Cell Signaling

Cadherin proteins help animal cells stick (adhere) to each other. Choose which statement about cadherin in cancer cells that are metastasizing (spreading) throughout a patient's body is most likely correct.

TLS Online TPP Program

#Question id: 1533

#Unit 4. Cell Communication and Cell Signaling

Why might using retroviral vectors for gene therapy increase the patient's risk of developing cancer?

TLS Online TPP Program

#Question id: 1532

#Unit 4. Cell Communication and Cell Signaling

For a particular microarray assay (DNA chip), cDNA has been made from the mRNAs of a dozen patients' breast tumor biopsies. Which of the following types of evidence will researchers be looking for in order to determine if the cells are cancerous?

TLS Online TPP Program

#Question id: 1530

#Unit 4. Cell Communication and Cell Signaling

What are the differences and similarities between the transforming genes of retroviruses and those of DNA tumor viruses?