Practice Questions

TLS Online TPP Program

#Question id: 28776

Which of the following statements is incorrect about actin molecules?

#Unit 2. Cellular Organization

It is a basic building block of microfilaments
It exists as a globular monomer -G-actin and filamentous polymer-F-actin
3 isoforms of actin molecules α, β and γ
α - expressed only non-muscle cells while β and γ - found together in almost all muscle cells

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TLS Online TPP Program

#Question id: 34135

#Unit 7. System Physiology – Animal

Glucagon increases glycogenolysis in liver cells but ACTH does not because

TLS Online TPP Program

#Question id: 34136

#Unit 7. System Physiology – Animal

A meal rich in proteins containing the amino acids that stimulate insulin secretion but low in carbohydrates does not cause hypoglycemia because':

TLS Online TPP Program

#Question id: 34137

#Unit 7. System Physiology – Animal

Which of the following best explains why glucose uptake into liver cells continues in insulin-resistant states, even when skeletal muscle glucose uptake is impaired?

TLS Online TPP Program

#Question id: 34138

#Unit 7. System Physiology – Animal

Which of the following hormones are nanopeptides with a disulfide ring at one end?

TLS Online TPP Program

#Question id: 34139

#Unit 7. System Physiology – Animal

I. Oxytocin and vasopressin are typical neural hormones , that is, hormones secreted into the circulation by nerve cells.

II. Vasopressin and oxytocin each have a characteristic neurophysin associated with them in the granules in the neurons.

III. The precursor for AVP, prepropressophysin , contains a 19-amino-acid residue leader sequence followed by AVP, neurophysin II, and a glycopeptide.

IV. Prepro-oxyphysin, the precursor for oxytocin, is a similar but smaller molecule that lacks the glycopeptide.

TLS Online TPP Program

#Question id: 34140

#Unit 7. System Physiology – Animal

Following stimulus stimulates vasopressin-secreting neurons, EXCEPT?