Practice Questions

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#Question id: 8714

The reason that paralogous genes can diverge from each other within the same gene pool, whereas orthologous genes diverge only after gene pools are isolated from each other, is that ________.

#Unit 9. Diversity of Life Forms

having multiple copies of genes is essential for the occurrence of sympatric speciation in the wild
paralogous genes can occur only in diploid species, thus they are absent from most prokaryotes
polyploidy is a necessary precondition for the occurrence of sympatric speciation in the wild
having an extra copy of a gene permits modifications to the copy without loss of the original gene product

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TLS Online TPP Program

#Question id: 21954

#Unit 2. Cellular Organization

Interphase chromatin remain attached to nuclear wall proteins via

TLS Online TPP Program

#Question id: 5263

#Unit 8. Inheritance Biology

Drug-resistance plasmids could be transferred in A. baumannii by which of the following mechanisms:

TLS Online TPP Program

#Question id: 12715

#Unit 6. System Physiology – Plant

Early-acting stress sensors provide the initial signal for the stress response, several possible examples of stress-sensing mechanisms that act early in the pathway have been identified. They include:

A) calcium channel (cyclic nucleotide-gated calcium channel) that senses changes in temperature

B) A kinase (SnRK1, a SNF1-related kinase 1) that senses energy depletion during stress

C) A plasma membrane histidine kinase (ATHK1) that senses osmotic stress

D) A leucine rich repeat receptor kinase (LRRK) protein (Srlk)

E) An endoplasmic reticulum transmembrane sensor inositol-requiring enzyme 1 (IRE1)

And activating several response after sensing these mechanisms;

i) activates hundreds of stress-response transcripts

ii) that functions as an upstream regulator of salinity responses in Arabidopsis

iii) that is required for acclimation to heat stress

iv) that is required for heat tolerance in plants

v) activates ABA-dependent and ABA-independent responses

Which of the following is the correct match the activating response with its sense mechanism;

TLS Online TPP Program

#Question id: 28964

#Unit 7. System Physiology – Animal

Iodide is transported out of the thyroid cells across the apical membrane into the follicle by transporter molecules known as____

TLS Online TPP Program

#Question id: 19987

#Unit 2. Cellular Organization

Evolutionary status of human are higher than amphibians while amount of gene is high in amphibian and flowering plant this can be termed as