Which of the following is correct

A. A set of homologous genes should share common features that preceded their evolutionary separation.

B. All globin genes have a common form of organization with four exons and one introns.

C. A gene family is defined as a group of genes that encode related or identical products as a result of gene-duplication events.

TLS Online TPP Program

#Question id: 10612

#Unit 10. Ecological Principles

dN/dt = rN (K-N/K )

The logistic equation above is used to describe therate of change of a population, N, with time, t, Where r is the intrinsic rate of increase and K is the carrying capacity. Which of the following value of N showing maximum growth rate?

  ( K= 420, r =.05)

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: 28401

#Unit 5. Developmental Biology

The Nieuwkoop centre is formed on the dorsal side of the embryo due to accumulation of beta-catenin which helps activate gene encoding protein, these protein known as____

TLS Online TPP Program

#Question id: 19740

#Unit 3. Fundamental Processes

Choose the correct statement

a) Telomeric RNA component is encoded by TLC1 in yeast, and hTERC in humans

b) Telomeric RNA component is encoded by hTERC in yeast, and TLC1 in humans

c) Telomerase protein component with catalytic activity is encoded by EST2 in yeast, hTERT in humans

d) Telomerase protein component with catalytic activity is encoded by hTERT in yeast, EST2 in humans

TLS Online TPP Program

#Question id: 1052

#Unit 4. Cell Communication and Cell Signaling

The correct order for the stages of a phage infection is: