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TLS Online TPP Program

#Question id: 1079

Smoking impairs the ciliated cells of the middle portion of the respiratory tract. Many analgesic drugs (painkillers) impair peristalsis (the churning motion of the digestive tract). The result of either of these activities leads to an increased risk of infection in their respective areas. Why?

#Unit 4. Cell Communication and Cell Signaling

  1. The actions of the cells in these areas help to propel pathogens out of the area, serving as a part of the physical barrier system. When they are impaired/slowed, bacteria and other pathogens have an easier time adhering to the tissues in the area and causing an infection.

  2. Ciliated cells also line the digestive tract, and these cells secrete strong natural antibacterial compounds. When they are impaired, bacteria can more easily infect these areas.

  3. Chemicals in cigarette smoke and the chemicals in painkillers impair our immune systems, making us generally more predisposed to infections (regardless of the tissue area).

  4. Chemicals in cigarette smoke and the chemicals in painkillers impair the ability of our immune system cells to move into areas that are infected. As such, they can't perform their job of eliminating microbes as well as they should and infections result more easily.

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TLS Online TPP Program

#Question id: 12772

#Unit 10. Ecological Principles

Which of the following is a likely graphic outcome of a population of deer introduced to an island with an adequate herbivory and without natural predators, parasites, or disease? 
TLS Online TPP Program

#Question id: 18723

#Unit 13. Methods in Biology

Which of the following will have more efficient ligation?
TLS Online TPP Program

#Question id: 27980

#Unit 1. Molecules and their Interaction Relevant to Biology

The proton-motive force has 
a. chemical potential energy due to proton-proton repulsion
b. chemical potential energy due to H+ difference in the two regions separated by the membrane 
c. electrical potential energy H+ difference in the two regions separated by the membrane 
d. electrical potential energy due to proton-proton repulsion

Which of the following is true
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: 18386

#Unit 12. Applied Biology

Biomagnification occurs mainly because of the following reasons
I. compounds are taken up from the environment and accumulated in the lipid deposits of body
II. organisms are consumed by other organisms in a non- sequential manner constituting the food chain
Which of the above statements are incorrect?