TLS Online TPP Program

#Question id: 5789


Which of the following defects causes ataxia telangiectasis?

#Unit 8. Inheritance Biology
  1. deficiency in kinase that controls the cell cycle

  2. deficient excision repair

  3. deficient mismatch repair

  4. inactive ligase that slows replication

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TLS Online TPP Program

#Question id: 33387

#Unit 1. Molecules and their Interaction Relevant to Biology

β Turn type I, i+2 residue has dihedral angle φ and ψ

TLS Online TPP Program

#Question id: 11082

#Unit 7. System Physiology – Animal

A 67-year-old man has a solid tumor that pushes against an airway partially obstructing air flow to the distal alveoli. Which point on the ventilation-perfusion line of the O2-CO2 diagram corresponds to the alveolar gas of these distal alveoli?


TLS Online TPP Program

#Question id: 11000

#Unit 7. System Physiology – Animal

What is her ventricular ejection fraction?


TLS Online TPP Program

#Question id: 1515

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to metastasis (using breast carcinoma cells as an example).

A. Cancer cells leave the main tumor and attack the basement membrane, using extracellular matrix (ECM) fibers to reach the blood vessels.

B. The cancer cells can be attracted by signals such as epidermal growth factor (EGF), which can be secreted by macrophages.

C. At the blood vessels they penetrate the layer of endothelial cells that forms the vessel walls and enter the bloodstream.

D. Carcinoma cells penetrate the extracellular matrix and blood vessel wall by extending “invadopodia,” which produce matrix metalloproteases and other proteases to open up a path.

Which of the following statement shows process of angiogenesis?

TLS Online TPP Program

#Question id: 12206

#Unit 7. System Physiology – Animal

Neonates that are kept in 100% oxygen incubators for several days become blind when they are removed from the incubator, a condition referred to as retrolental fibroplasia. What is the explanation for the loss of sight?