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TLS Online TPP Program

#Question id: 760

Which force can stabilize a DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Hydrophobic bases are found in the interior of the helix where each base pair is stabilized by the same number of hydrogen bonds.

  2. Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.

  3. Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.

  4. Covalent base-stacking interactions can occur between adjacent bases within the same strand in the helix.

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TLS Online TPP Program

#Question id: 20283

#Unit 7. System Physiology – Animal

The following statements regarding to the pancreas and its function.
a. The pancreas is composed of two major types of tissues, (1) the acini, which secrete digestive juices into the duodenum, and (2) the islets of Langerhans, which secrete insulin and glucagon directly into the blood.
b. The islets contain three major types of cells, alpha, beta, and delta cells
c. The beta cells, constituting about 25 percent of all the cells of the islets, lie mainly in the middle of each islet and secrete insulin and amylin.
d. The alpha cells, about 60 percent of the total, secrete glucagon and the delta cells, about 10 percent of the total, secrete somatostatin.
TLS Online TPP Program

#Question id: 20284

#Unit 7. System Physiology – Animal

What is the importance of C-peptide in proinsulin?
TLS Online TPP Program

#Question id: 20285

#Unit 7. System Physiology – Animal

Which of the following is CORRECT?
TLS Online TPP Program

#Question id: 20286

#Unit 7. System Physiology – Animal

Except for that portion of the insulin that combines with receptors in the target cells, the remainder is degraded by the enzyme _____?
TLS Online TPP Program

#Question id: 20287

#Unit 7. System Physiology – Animal

Match the medications to their main action:

1. Thiazolidinedionesa. to control plasma glucose
2. Metforminb. cause additional release of insulin by the pancreas
3. Sulfonylureasc. suppress liver glucose production
4. Insulind. increase insulin sensitivity
TLS Online TPP Program

#Question id: 20288

#Unit 7. System Physiology – Animal

The effects of insulin on nutrient flow are given below:
a. Increases glycogen formation
b. Increases glycogenolysis
c. Decreases gluconeogenesis
d. Increases lipolysis
e. Increases protein synthesis
Choose the correct combination: