TLS Online TPP Program

#Question id: 11134


Which of the following statements concerning synaptic transmission is correct?

#Unit 7. System Physiology – Animal
  1. When a specific population of synaptic terminals is spread over the considerable surface of a neuron, their collective effects cannot spatially summate and lead to initiation of an action potential
  2. Even if the successive discharges of an excitatory synapse occur sufficiently close in time, they cannot temporally summate and initiate an action potential
  3. A neuron is “facilitated” when its membrane potential is moved in the less negative or depolarizing direction
  4. Even when rapidly stimulated by excitatory synaptic input for a prolonged period of time, neurons typically do not exhibit synaptic fatigue
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TLS Online TPP Program

#Question id: 10528

#Unit 6. System Physiology – Plant

The insect ingests plant tissue containing the fatty acids, an enzyme in the gut conjugates the plant-derived fatty acid to an insect-derived amino acid typically;

TLS Online TPP Program

#Question id: 10529

#Unit 6. System Physiology – Plant

Insects produces an elicitors molecules that is caeliferins at the wound site in Arabidopsis plant, which induces

TLS Online TPP Program

#Question id: 10530

#Unit 2. Cellular Organization

The transfer of a lipid molecule across a bilayer, a process termed:

TLS Online TPP Program

#Question id: 10531

#Unit 2. Cellular Organization

Flippases catalyze translocation of the aminophospholipids:

TLS Online TPP Program

#Question id: 10532

#Unit 2. Cellular Organization

A  closed, self-sealing solvent-filled vesicles that are bounded by only a single bilayer, known as:

TLS Online TPP Program

#Question id: 10533

#Unit 2. Cellular Organization

Following statements are regarding to the fluidity of a bilayer.

A. A lipid bilayer cools below a characteristic transition temperature, it undergoes a sort of phase change in which it becomes a liquid; that is, it loses its fluidity.

B. Above the transition temperature, the highly mobile lipids are in a state known as a liquid crystal.

C. The bilayer is thicker in the gel state than in the liquid crystal state due to the stiffening of the hydrocarbon tails at lower temperatures.

D. The transition temperature of a bilayer decreases with the chain length and the degree of saturation of its component fatty acid residues for the same reasons that the melting points of fatty acids increase with these quantities.

Which of the following combination is correct?