Practice Questions

TLS Online TPP Program

#Question id: 34143

Which of the following best explains how normal plasma oxytocin levels at the onset of labor can still result in powerful uterine contractions?

#Unit 7. System Physiology – Animal

The uterus begins secreting its own oxytocin, which inhibits progesterone and directly stimulates the fetal adrenal cortex.
The descent of the fetus stimulates a hypothalamic feedback loop that rapidly increases systemic oxytocin to supraphysiologic levels.
There is a marked upregulation of uterine oxytocin receptors at term, making the myometrium hypersensitive even to baseline oxytocin levels, initiating a positive feedback loop.
Oxytocin receptors on the cervix and vagina directly stimulate the anterior pituitary to secrete oxytocin during early labor.

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TLS Online TPP Program

#Question id: 13021

#Unit 10. Ecological Principles

Which marine zone would have the lowest rates of primary productivity (photosynthesis)?

TLS Online TPP Program

#Question id: 13022

#Unit 10. Ecological Principles

A certain species of pine tree survives only in scattered locations at elevations above 2,800 m in the western United States. To understand why this tree grows only in these specific places an ecologist should

TLS Online TPP Program

#Question id: 13023

#Unit 13. Methods in Biology

Which of the following enzymes are required for end labelling?

TLS Online TPP Program

#Question id: 13024

#Unit 13. Methods in Biology

Inset and the vector can be ligated if they are digested by a pair of –

TLS Online TPP Program

#Question id: 13025

#Unit 13. Methods in Biology

Which enzyme is used for homopolymer tailing?

TLS Online TPP Program

#Question id: 13026

#Unit 13. Methods in Biology

A blunt ended insert can not be ligated with a blunt ended vector by means of which of the followings:-