TLS Online TPP Program

#Question id: 7269


Following statements are regarding to gastrulation in chick embryo.

A. During gastrulation, future mesodermal and endodermal cells migrate from the epiblast through the primitive streak into the interior of the blastoderm.

B. An aggregation of cells, known as Hensen’s node, forms at the posterior end of the streak.

C. As the streak extends, cells of the epiblast move toward the primitive streak, through it, and then outward again underneath the surface to give rise internally to the mesoderm and endoderm, the latter displacing a lower layer of cells called the endoblast.

D. Cells that remain in the epiblast form the endoderm.

Which of the following statements are correct?

#Unit 5. Developmental Biology
  1. A, B and C
  2. A and C
  3. B and C
  4. A only
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What is the most probable explanation for the continued presence of pseudogenes in a genome such as our own?

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#Unit 6. System Physiology – Plant

Classification of plant mineral nutrients according to biochemical function

          

                  Mineral nutrient

 

                       Functions

 

      A.)  Silicon(Si)

 

     1.)    Constituent of alcohol dehydrogenase, glutamic dehydrogenase, carbonic anhydrase, etc

     B.)  Manganese(Mn)

     2.)    Component of sugar phosphates, nucleic acids, nucleotides, coenzymes, phospholipids, phytic acid, etc. Has a key role in reactions that involve ATP

      C.)  Zinc(Zn)

     3.)    Contributes to cell wall mechanical properties, including rigidity and elasticity.

 

      D.)  Phosphorous(P)

     4.)    Component of ascorbic acid oxidase, tyrosinase, monoamine oxidase, uricase, cytochrome oxidase, phenolase, laccase, and plastocyanin.

      E.)   Copper(Cu)

     5.)    Required for activity of some dehydrogenases, decarboxylases, kinases, oxidases, and peroxidases. Involved with other cation-activated enzymes and photosynthetic O2 evolution


Which of the following combination is correct?

TLS Online TPP Program

#Question id: 5223

#Unit 11. Evolution and Behavior

In order to determine the probable function of a particular sequence of DNA in humans, what might be the most reasonable approach?