Practice Questions

TLS Online TPP Program

#Question id: 12288

One way to understand how early environment influences differing behaviours in similar species is through the ? cross- fostering? Experimental technique. Suppose that the curly- whiskered mud rat differs from the bald mud rat in several ways, including being much more aggressive. How would you set up a cross- fostering experiment to determine if environment plays a role in the curly- whiskered mud rat's aggression?

#Unit 10. Ecological Principles

You would cross curly- whiskered mud rats and bald mud rats and hand- rear the offspring.
You would place new-born curly- whiskered mud rats with bald mud rat parents, place new-born bald mud rats with curly- whiskered mud rat parents, and let some mud rats of both species be raised by their own species. Then compare the outcomes.
You would remove the offspring of curly- whiskered mud rats and bald mud rats from their parents and raise them in the same environment.
You would see if curly- whiskered mud rats bred true for aggression.

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TLS Online TPP Program

#Question id: 14755

#Unit 6. System Physiology – Plant

Any active transport mechanism that results in the movement of a net electric charge will tend to move the membrane potential away from the value predicted by the Goldman equation. Such a transport mechanism is called

TLS Online TPP Program

#Question id: 14862

#Unit 6. System Physiology – Plant

Nitrate transport is an example that is of interest not only because of its nutritional importance, nitrate is negatively charged, and such an electric charge imposes an energy requirement for the transport, Mutants in nitrate transport or nitrate reduction can be selected by growth in the presence of chlorate, Chlorate is;

TLS Online TPP Program

#Question id: 14863

#Unit 6. System Physiology – Plant

Plant and fungal plasma membrane H+-ATPases and Ca2+-ATPases are members of a class known as P-type ATPases, which are phosphorylated as part of the catalytic cycle that hydrolyzes ATP. Because of this phosphorylation step, the plasma membrane ATPases are strongly inhibited by

TLS Online TPP Program

#Question id: 14864

#Unit 6. System Physiology – Plant

Which of the following statements of ATPase is INCORRECT?

TLS Online TPP Program

#Question id: 14899

#Unit 6. System Physiology – Plant

The energy required for active transport is often provided by the hydrolysis of ATP. In plants we can study the dependence of the membrane potential on ATP by observing the effect of cyanide (CN–), What wil be the effect of cyanide(Cn-),

a.) Cyanide rapidly poisons the mitochondria as ATP synthesis is inhibited, the membrane potential falls below -50mV

b.) Cyanide inhibits the electron transport but not inhibit the ATP synthesis, the membrane potential positive

c.) Cyanide inhibits the electrogenic ion transport the pH of the external medium increases while the cytosol becomes acidic because H+ remains inside the cell

d.) Cyanide inhibits the electrogenic ion transport the pH of the external medium acidic while the cytosol becomes alkaline because H+ remains outside of the cell

Which of the following statements regarding effect of cyanide is CORRECT?

TLS Online TPP Program

#Question id: 14900

#Unit 6. System Physiology – Plant

polymer-trapping model explains symplastic loading in plants, This model states that the sucrose diffussion takes place through cell to cell via plasmodesmata; which of the following prediction about the diffusion mechanism is INCORRECT?