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TLS Online TPP Program

#Question id: 1714

In a lymph node, the antigen pneumococcus polysaccharide SIII leads to:

#Unit 4. Cell Communication and Cell Signaling

  1. Lymphocyte proliferation in the paracortex

  2. Periarteriolar lymphoid sheath (PALS) development

  3. Development of cellular hypersensitivity

  4. Proliferation in cortical lymphoid follicles

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TLS Online TPP Program

#Question id: 2580

#Unit 2. Cellular Organization

Following statements are regarding to mechanism of kinesin-1 movement.

A. Initially leading head tightly bound to the microtubule and not bound by any nucleotide, while the trailing head is weakly bound to the microtubule and has ADP bound.

B. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former trailing head to become the leading head.

C. Binding of ATP induces a conformational change causing the linker to swing forward and dock into the head. This motion swings the former leading head to become the trailing head.

D. When leading head releases ADP and coordinately the trailing head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

E. When trailing head releases ADP and coordinately the leading head hydrolyzes ATP to ADP + Pi. Pi is released and the linker becomes undocked.

Which of the following combination is correct?
TLS Online TPP Program

#Question id: 15387

#Unit 8. Inheritance Biology

How might the results of Bernard Davis's U tube experiment have been different if each strain were only mutant for a single gene?
TLS Online TPP Program

#Question id: 12291

#Unit 10. Ecological Principles

A school of fish splitting in two and baffling a predator is an example of the ____________.
TLS Online TPP Program

#Question id: 7214

#Unit 5. Developmental Biology

The anterior posterior compartment of each segment of drosophila is defined by wingless and engrailed genes. The following statements are given towards explaining their regulation:

A.cells secreting Hedgehog protein activate wingless expression in their neighbors, and the Wingless protein signal, which is received by the cells that secreted Hedgehog, serves to maintain hedgehog (hh) expression.

B.Engrailed protein also acts in an autocrine fashion, maintaining its own expression.

C.The cells expressing engrailed can bind wingless protein because they contain Frizzled, which is the Drosophila membrane receptor protein for Wingless.

D.Binding of Wingless to Frizzled activates the hedgehog signal transduction pathway, resulting in the continued expression of engrailed.

Which of the following option has all the incorrect statements?
TLS Online TPP Program

#Question id: 5621

#Unit 5. Developmental Biology

In sea urchin, the bindin receptor activates________ which activates PLC-