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: 26988

#Unit 10. Ecological Principles

If the extinction rate is 0.5 & migration rate is 0.7,then calculate the proportion of occupied patches will stabilize over time ?

TLS Online TPP Program

#Question id: 13147

#Unit 8. Inheritance Biology

A cross was made between pure Blue and long pollen length with white and short pollen length. The F1 were test crossed. The F2 progeny obtained was as follows:

The genetic distance (cM) between flower colour and pollen length is;

TLS Online TPP Program

#Question id: 1064

#Unit 4. Cell Communication and Cell Signaling

An infection in which the virus is continually present in the body is referred to as

TLS Online TPP Program

#Question id: 27090

#Unit 1. Molecules and their Interaction Relevant to Biology

Steroids receptor are

TLS Online TPP Program

#Question id: 2152

#Unit 2. Cellular Organization

Precursors of membrane phospholipids are

a. soluble in the cytosol.

b. incorporated into biosynthetic intermediates.

c. sometimes complexed with fatty-acid-binding proteins.

d. stored in glycerolosomes.

e. sometimes activated by conjugation with CDP.