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TLS Online TPP Program

#Question id: 2220

Cell membranes have distinct inside and outside faces. Which of the following statements is the most likely explanation for the membrane's asymmetrical nature?

#Unit 2. Cellular Organization

  1. Since the cell membrane forms a border between one cell and another in tightly packed tissues such as epithelium, the membrane must be asymmetrical.

  2. Since cell membranes communicate signals from one organism to another, the cell membranes must be asymmetrical.

  3. The two sides of a cell membrane face different environments and carry out different functions.

  4. Proteins only function on the cytoplasmic side of the cell membrane, which results in the membrane's asymmetrical nature.

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TLS Online TPP Program

#Question id: 10647

#Unit 10. Ecological Principles

Use the graph to answer the following question


In the figure, which of the following survivorship curves implies that an animal may lay many eggs, of which a regular number die each year on a logarithmic scale?
TLS Online TPP Program

#Question id: 11360

#Unit 10. Ecological Principles

Which of the following can contribute to the numerical response of a predator?
TLS Online TPP Program

#Question id: 28401

#Unit 5. Developmental Biology

The Nieuwkoop centre is formed on the dorsal side of the embryo due to accumulation of beta-catenin which helps activate gene encoding protein, these protein known as____
TLS Online TPP Program

#Question id: 14827

#Unit 2. Cellular Organization

The structures used for motility in both eukaryotes and prokaryotes are
TLS Online TPP Program

#Question id: 31156

#Unit 7. System Physiology – Animal

Which of the following is the metabolic center of the neuron?