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TLS Online TPP Program

#Question id: 7143

The development of drugs to block the activity of vascular endothelial growth factor (VEGF) has been applied to the control of the growth of cancers. What is the rationale for such a strategy?

#Unit 5. Developmental Biology
  1. Tumor cells produce VEGF to stimulate angiogenesis in their vicinity, and tumors cannot continue to grow without this supply of blood.
  2. Blocking VEGF prevents vasculogenesis in the embryo, and if done properly prevents cancer later in life.
  3. VEGF causes blood vessels to grow toward cancers, which kills the cancer due to too much blood.
  4. VEGF is a key controller of the adoption of tumor phenotypes by cells, so blocking it will help control cancer.
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TLS Online TPP Program

#Question id: 2234

#Unit 2. Cellular Organization

Which of the following statement(s) is (are) true of transmembrane proteins?

a. All contains a hydrophobic α helix.

b. Some serve as membrane attachment sites for peripheral membrane proteins.

c. Some contain more than one membrane-spanning domain.

d. All are asymmetrically oriented in the lipid bilayer.
TLS Online TPP Program

#Question id: 3312

#Unit 11. Evolution and Behavior

Hardy-Weinberg equilibrium, the frequencies of the two alleles A1 and A2 is 0.4 and 0.6. When you consider A2 is dominant allele of genetic disorder. The frequency of defected individuals, in population size 1000 is
TLS Online TPP Program

#Question id: 19363

#Unit 13. Methods in Biology

What is the size limit for in vitro packaging of an unmodified lambda vector?
TLS Online TPP Program

#Question id: 1558

#Unit 4. Cell Communication and Cell Signaling

Work of follicular dendritic cells
TLS Online TPP Program

#Question id: 28695

#Unit 2. Cellular Organization

O-linked oligosaccharides is representing the attachment of glycoproteins to the hydroxyl (–OH) group in which amino acid residue?