#Question id: 5678
#Unit 5. Developmental Biology
Following process and their mechanism during fertilization in mammals.
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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 |
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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. |
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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. |
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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 |
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Which of the following option is correct?
#Question id: 24626
#Unit 2. Cellular Organization
In the yeast the isolation of double mutants can be analysed by
#Question id: 560
#Unit 1. Molecules and their Interaction Relevant to Biology
Vmax for an enzyme-catalyzed reaction:
#Question id: 28246
#Unit 5. Developmental Biology
which of the following pathway is activated by paracrine factor in the adjacent germ stem cells to specify their self-renewal
#Question id: 12555
#Unit 10. Ecological Principles