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TLS Online TPP Program

#Question id: 5678

Following process and their mechanism during fertilization in mammals.

 a. Rheotaxis

i.A sensing mechanism in which, the oocyte and its accompanying

cumulus cells secrete molecules that attract capacitated

sperm toward the egg during the last stages of sperm migration

b.  Chemotaxis

ii.It is a transient event, and sperm are given a relatively brief window of competence during which they can successfully fertilize the egg.

c.  Capacitation

iii.it is the ability to sense temperature difference and preferentially swim from cooler to warmer sites is found only in capacitated sperm.

d. Thermotaxis

iv.Sperm receive long-distance directional cues from the flow of liquid from the oviduct to the uterus and they will migrate against the direction of the flow—using CatSper calcium channels to sense calcium influx and monitor the direction of the current
     

Which of the following option is correct?

#Unit 5. Developmental Biology

  1. a-i, b-ii, c-iii, d-iv

  2. a-iv, b-i, c-ii, d-iii

  3. a-iv, b-iii, c-ii, a-i

  4. a-i, b-iii, c-ii, a-iv

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TLS Online TPP Program

#Question id: 27963

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is completely true about the α-ketoglutarate dehydrogenase complex
TLS Online TPP Program

#Question id: 27964

#Unit 1. Molecules and their Interaction Relevant to Biology

Enzymes their location and cofactor along with the inhibitors is given 
a. Citrate synthase Located in Matrix space uses CoA as cofactor and can be inhibited by Monofluoroacetyl-CoA
b. Aconitase Located in Inner membrane uses Fe2+ as cofactor and can be inhibited by Fluoro acétate
c. Isocitrate dehydrogenase Located Matrix space in uses NAD, NADP Mg2+. Mn2+ as cofactor and can be inhibited by ATP
d. Succinate dehydrogenase Located in Inner membrane uses FAD as cofactor and can be inhibited by Malonate, Oxaloacetate

Which of the following is correct
TLS Online TPP Program

#Question id: 27965

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following provide moonlighting for  both uracil DNA glycosylase, effecting the repair of damaged DNA, and as a regulator of histone H2B transcription 
TLS Online TPP Program

#Question id: 27966

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following acts in the nucleus to regulate the transcription of genes that respond to thyroid hormone.
TLS Online TPP Program

#Question id: 27967

#Unit 1. Molecules and their Interaction Relevant to Biology

Malonate is an analog of succinate not normally present in cells, is a strong competitive inhibitor of succinate dehydrogenase, and its addition to mitochondria blocks the activity of the
TLS Online TPP Program

#Question id: 27968

#Unit 1. Molecules and their Interaction Relevant to Biology

As intermediates of the citric acid cycle are removed to serve as biosynthetic precursors, they are replenished by