TLS Online TPP Program

#Question id: 2180


How does inhibition of the Na+/K+ ATPase increase the force of heart muscle contraction?

#Unit 2. Cellular Organization
  1. It increases cytosolic Na+ and therefore decreases Ca2+ export.

  2. It increases cytosolic K+ and therefore decreases Ca2+ export.

  3. It decreases cytosolic Na+ and therefore decreases Ca2+ export.

  4. It decreases cytosolic K+ and therefore decreases Ca2+ export.

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TLS Online TPP Program

#Question id: 18782

#Unit 13. Methods in Biology

The concentration of a small amount antibodies 2 μg antibody/ml can be detected

TLS Online TPP Program

#Question id: 2334

#Unit 2. Cellular Organization

Membrane proteins

TLS Online TPP Program

#Question id: 7256

#Unit 5. Developmental Biology

Sox9 is an autosomal gene involved in several developmental processes, most notably bone formation. In the gonadal rudiments, Sox9 induces testis formation. Expression of the Sox9 gene is specifically upregulated by the combined expression of Sry and Sf1 proteins in Sertoli cell precursors. Thus, Sry may act merely as a “switch” operating during a very short time to activate Sox9, and the Sox9 protein may initiate the conserved evolutionary pathway to testis formation. Following statements are regarding to the functions of Sox9.

A. It appears to be able to activate its own promoter, thereby allowing it to be transcribed for long periods of time.

B. It activates the ability of β-catenin to induce ovary formation, either directly or indirectly.

C. It binds to cis-regulatory regions of numerous genes necessary for testis production.

D. Sox9 binds to the promoter site on the gene for anti-Müllerian hormone, providing a critical link in the pathway toward a male phenotype.

E. Sox9 inhibits the expression of the gene encoding Fgf9, a paracrine factor.

Which of the following statements are correct?

TLS Online TPP Program

#Question id: 1717

#Unit 4. Cell Communication and Cell Signaling

Which of the following functions are macrophages unable to carry out?

TLS Online TPP Program

#Question id: 29033

#Unit 11. Evolution and Behavior

a one type of phenotypic character present in animals which differ between the sexes but do not play a direct role in reproduction, this trait is called as ?