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TLS Online TPP Program

#Question id: 2228

Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this fact most probably mean?

#Unit 2. Cellular Organization

  1. Proton gradients across a membrane were used by cells that were the common ancestor of all three domains of life.

  2. The high concentration of protons in the ancient atmosphere must have necessitated a pump mechanism.

  3. Cells of each domain evolved proton pumps independently when oceans became more acidic.

  4. Proton pumps are necessary to all cell membranes.

More Questions
TLS Online TPP Program

#Question id: 2137

#Unit 2. Cellular Organization

Membrane fusion leading to neurotransmitter release requires the action of:
TLS Online TPP Program

#Question id: 2138

#Unit 2. Cellular Organization

Integrins are
TLS Online TPP Program

#Question id: 2139

#Unit 2. Cellular Organization

A process not involving the fusion of two membranes or two regions of the same membrane is:
TLS Online TPP Program

#Question id: 2140

#Unit 2. Cellular Organization

According to the current model for HIV infection, which of the following is not involved in the process of membrane fusion?
TLS Online TPP Program

#Question id: 2141

#Unit 2. Cellular Organization

Facilitated diffusion through a biological membrane is:
TLS Online TPP Program

#Question id: 2142

#Unit 2. Cellular Organization

Glucose transport into erythrocytes is an example of