TLS Online TPP Program

#Question id: 5556


Contact of a sea urchin egg with signal molecules on sperm causes the egg to undergo a brief ________.

#Unit 5. Developmental Biology
  1.  mitosis

  2. membrane depolarization

  3. vitellogenesis

  4. acrosomal reaction

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TLS Online TPP Program

#Question id: 18980

#Unit 13. Methods in Biology

The most widely used strong regulatable promoters are those

TLS Online TPP Program

#Question id: 10132

#Unit 6. System Physiology – Plant

Which of the following statements would be correct for photophosphorylation ?

TLS Online TPP Program

#Question id: 10383

#Unit 6. System Physiology – Plant

The nitrogenase enzyme complex fixes N2 produces ammonia, The nitrogenase enzyme complex catalyzes this reaction by following characteristics given below;

a) It can be separated into two components—the Fe protein and the MoFe protein— neither of which has catalytic activity by itself

b) Fe protein is the smaller of the two components and has two identical subunits, each contains an iron–sulfur cluster, which participates in the redox reactions

c) The Fe protein is irreversibly inactivated by O2 while MoFe protein is activated by O2

d) MoFe protein has four subunits, each subunit has two Mo–Fe–S clusters

e) Ferredoxin serves as an electron donor to the Fe protein, and Fe protein reduces the MoFe protein without any hydrolysing ATP

f) Only prokaryotes have nitrogenase enzyme

Which of the following characteristics of nitrogenase enzyme complex is incorrect?

TLS Online TPP Program

#Question id: 5553

#Unit 5. Developmental Biology

The notochord is a ___ structure in vertebrate embryos that lies under the ___, and is bordered by ___.

TLS Online TPP Program

#Question id: 15386

#Unit 8. Inheritance Biology

You set up a mapping cross involving your favorite gene (YFG) in Neurospora and determine the following octad types: 4:4 arrangement 83; 2:4:2 arrangement 7; 2:2:2:2 arrangement 10. What is the distance between your gene and the centromere?