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TLS Online TPP Program

#Question id: 7115

The ability of the sea urchin embryo to regulate its development illustrates the fact that there are maternally-determined differences along the animal-vegetal axis that are necessary for normal development. Which of the following statements about regulation in sea urchin embryos is consistent with that fact?

#Unit 5. Developmental Biology
  1. Up until the hatching of the embryo as a pluteus larva, any blastomere can be separated from the others and will regulate to go on and develop into a fully formed and full-sized larva.
  2. Up until the hatching of the embryo as a pluteus larva, any blastomere can be separated from the others and will regulate to go on and develop into a fully formed, yet smaller, larva.
  3. Blastomeres from the animal or vegetal poles of the embryo can be isolated and will go on to form an embryo, as long as either an animal or vegetal pole is included.
  4. Blastomeres at the 4-cell stage each still possesses a portion of the original animal-vegetal axis, and if isolated will go on to form a fully formed, yet smaller, larva.
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TLS Online TPP Program

#Question id: 28097

#Unit 6. System Physiology – Plant

Asada-Halliwell pathway protects plants against oxidative stress during unfavorable environmental growth regimes 
a. Also known as The ascorbate-glutathione pathway 
b. Involved only enzymatic reaction 
c. Involved both enzymatic as well as non enzymatic reation 
d. Is an indispensable component of the ROS homeostasis mechanism of plants
Which of the following is correct
TLS Online TPP Program

#Question id: 12906

#Unit 13. Methods in Biology

An alternative method labeling strategy used in karyotyping and gene localisation is _______
TLS Online TPP Program

#Question id: 3746

#Unit 3. Fundamental Processes

During recombination in E. coli, ________ recognize(s) regions of sequence similarity and promote(s) strand invasion, while ________ bind(s) to a Holliday junction promoting strand migration.
TLS Online TPP Program

#Question id: 9198

#Unit 9. Diversity of Life Forms

Tropical forests are being converted to farm or pasture land at an alarming rate, and one major focus is on the biodiversity and the impact to these ecosystems. What is a direct benefit to humans that helps explain why these forests need to be preserved?
TLS Online TPP Program

#Question id: 15259

#Unit 2. Cellular Organization

Which media are called as general purpose media because they support the growth of many microorganisms.