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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 ________.

#SCPH28 | Zoology
  1. having multiple copies of genes is essential for the occurrence of sympatric speciation in the wild
  2. paralogous genes can occur only in diploid species, thus they are absent from most prokaryotes
  3. polyploidy is a necessary precondition for the occurrence of sympatric speciation in the wild
  4. having an extra copy of a gene permits modifications to the copy without loss of the original gene product
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#Question id: 760

#SCPH01 Biochemistry

Which force can stabilize a DNA double-helix?

TLS Online TPP Program

#Question id: 10354

#I Life Science/ Life Sciences Group – I-V

One of the enzyme that are involve in the ammonium assimilation is Asparagine synthetase (AS), some statements given below about AS such as,

a) This enzyme that catalyzes this reaction, is found in the cytosol of leaves and roots and in nitrogen-fixing nodules

b) High levels of light and carbohydrate inhibit the expression of genes coding for AS and the activity of the enzyme

c) Conditions of ample energy stimulate AS, thus they favor nitrogen assimilation into glutamine and glutamate

d) Energy-limited conditions inhibit GS and GOGAT, stimulate AS, and thus favor nitrogen assimilation into asparagine, a compound that is rich in nitrogen and sufficiently stable for long-distance transport or long term storage

Which of the following statements about AS is correct?

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#Question id: 5013

#SCPH06 I Botany

Following is correct match

Periods

Age of evolutionary event

A- Jurassic

I- Fish

B- Ordovician

II- Amphibian

C- Devonian

III- Gymnosperm

D-Carbonyferous

IV- Invertebrates

TLS Online TPP Program

#Question id: 5132

#SCPH01 Biochemistry

Upon secretion of wnt, When Wnt attaches to the Frizzled receptor on a responding cell, the cell secretes Notum, a hydrolase that associates with glypican and then cleaves off Wnt’s attached lipids in a process of deacylation or delipidation. This process:

TLS Online TPP Program

#Question id: 682

#SCPH05 I Biotechnology

The principle forces holding subunits of an oligomeric protein to each other are ________.