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TLS Online TPP Program

#Question id: 24463

A 56-year-old female was diagnosed with a tumor near the base of the skull, impinging on her optic tract. Which of the following statements about the central visual pathway is correct?

#Unit 7. System Physiology – Animal
  1. The fibers from each temporal hemiretina decussate in the optic chiasm, so that the fibers in the optic tracts are those from the temporal half of one retina and the nasal half of the other.
  2. In the geniculate body, the fibers from the nasal half of one retina and the temporal half of the other synapse on the cells whose axons form the geniculocalcarine tract.
  3. Layers 2 and 3 of the visual cortex contain clusters of cells called globs that contain a high concentration of cytochrome oxidase.
  4. Complex cells have a preferred orientation of a linear stimulus and, compared to simple cells, are more dependent on the location of the stimulus within the visual field.
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TLS Online TPP Program

#Question id: 1592

#Unit 4. Cell Communication and Cell Signaling

Which of these molecules is incorrectly paired with a source?
TLS Online TPP Program

#Question id: 18802

#Unit 13. Methods in Biology

Instead of Propidium iodide-labeled cell an alternate compound can be used which is Carboxyfluorescein succinimidyl ester (CFSE) in CFSE labeling amount of fluorescence emitted is cut in half each time the cell divides. The nature of this compound is
TLS Online TPP Program

#Question id: 10377

#Unit 6. System Physiology – Plant

Nod factors are recognized by the Nod factor receptor (NFR) in legumes, Upon binding to Nod factors, the NFR heterodimer initiates two main separate processes mediated by SYMRK such as;

a) A signaling pathway that facilitates the infection process itself

b) Activation of the symbiosis receptor-like kinase (SYMRK)

c) Activating an extracellular domain that includes a leucine rich repeat (LRR) region and an intracellular protein kinase domain

d) The activation of a set of genes that regulate the formation of root nodules

Which of the following are the two main separate processes of NFR heterodimer?
TLS Online TPP Program

#Question id: 11144

#Unit 7. System Physiology – Animal

The membrane potential in which there is no net movement of the ion across the membrane is called the ________.
TLS Online TPP Program

#Question id: 5671

#Unit 5. Developmental Biology

Match the following mechanism of polyspermy (Column I) with events (Column II).

 Column I

 Column II

A. Fast block to polyspermy

i. chemicals from the fusing sperm cytoplasm alter the sodium ion (Na+) channels on the membrane

B. Slow block to polyspermy

ii. enzyme cortical granule serine

protease, cleaves the protein posts that connect the vitelline envelope

iii the concentration of free Ca2+ in the egg cytoplasm increases

iv. an electric change in the egg cell membrane

v. the concentration of free Na+ in the egg cytoplasm increases

Which of the following is correct?