7 Microbial Physiology Module 7: Transport

Of the following transport systems, which require(s) energy input?

• Simple diffusion

• Facilitated diffusion

• Active transport

• All of the aforementioned.

• None of the aforementioned.

Which of the following is NOT TRUE about “Proton Current” across the membrane?

• Protons are translocated to the cell surface, driven there by either chemical or light energy through a proton pump.

• Protons are returned through special proton transporters.

• The accumulation of protons on the outside surface of the membrane establishes a membrane potential.

• A pH gradient can also be established.

• None of the aforementioned.

Which is NOT a characteristic of membrane transport systems?

• Show a saturation effect

• High specificity

• High energy requiring

• Highly-regulated

• None of the aforementioned.

Which of the following DOES NOT require carrier proteins?

• Simple diffusion

• Facilitated diffusion

• Active transport

• ABC transporter

• None of the aforementioned

Which of the following is NOT TRUE about Phosphotransferase system?

• The transported substance is chemically modified during the transport process.

• An energy-rich organic compound rather than the proton motive force drives the transport event.

• ATP is the main source of energy.

• Mainly for sugar transport.

• None of the aforementioned.

What type of organism has the ability to make its own food?

• Autotrophs

• Lithotrophs

• Heterotrophs

• Phototrophs

• None of the aforementioned.

Plants, algae, and some microorganisms use energy from the sun to make organic molecules in a process called?

• Electron transport chain

• Photosynthesis

• Photoautotrophy

• Photoorganotrophy

• None of the aforementioned

______ use inorganic molecules to make organic compounds in a process called photosynthesis.

• Autotrophs

• Lithotrophs

• Heterotrophs

• Phototrophs

• None of the aforementioned.

Which of the following is FALSE about photolithotrophs?

• Inorganic H+/e- donor

• CO2 as main carbon source

• Light as main energy source

• Organic compounds as H+/e- donor

• None of the aforementioned.

Which of the following is FALSE about chemoorganotrophs?

• Organic H+/e- donor

• Inorganic H+/e- donor

• Organic compounds as main energy source

• Organic compounds as main carbon source

• None of the aforementioned