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TLS Online TPP Program

#Question id: 11779

Which of the following decreases the resistance in the arteries leading to the sinuses of the penis?

#Unit 7. System Physiology – Animal
  1. Stimulation of the sympathetic nerves innervating the arteries
  2. Nitric oxide
  3. Inhibition of activity of the parasympathetic nerves leading to the arteries
  4. All of the above
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TLS Online TPP Program

#Question id: 9236

#Unit 9. Diversity of Life Forms

Which of the following outcomes is caused by excessive nutrient runoff into aquatic ecosystems?
TLS Online TPP Program

#Question id: 16126

#Unit 13. Methods in Biology

2 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS, that could explain the effect of the gln2– and gln3– mutations on the regulation of GLN1.
The GLN1 gene shows a rather complex regulation in response to different amino acids. When either glutamate (glu) or glutamine (gln) is added to the medium, the amount of GS expression diminished and when both glutamate and glutamine are added to the medium GS expression is shut off completely. The effects of different mutants on the response to glu and gln are shown below.
TLS Online TPP Program

#Question id: 5725

#Unit 8. Inheritance Biology

An individual is having an inversion in heterozygous condition. The regions on normal chromosome are marked as A, B, C, D, E, F, G while the chromosome having inversion has the regions as a, b, e, d, c, f, g. The diagram given below shows pairing of these two homologous chromosomes during meiosis and the site of a crossing over is indicated:

The following statements are given to describe the inversion and the consequence of crossing over shown in the above diagram:

A. This is a paracentric inversion

B. This will generate a dicentric and an acentric chromosome following separation of chromosomes after crossing over

C. This will generate two recombinant chromosomes with deletion and other parental chrmosome following separation of chromosomes after crossing over

D. 50 % gametes will be non viable due to deletion or duplication of chromatids

E. The gametes having recombinant chromatid or parental inversion chromatids will be non-viable
TLS Online TPP Program

#Question id: 1872

#Unit 4. Cell Communication and Cell Signaling

Which of the following have NOT provided examples of secondary immunodeficiency?
TLS Online TPP Program

#Question id: 1177

#Unit 4. Cell Communication and Cell Signaling

Binding of hormone to a receptor tyrosine kinase causes all of the following, except: