Link the set-up correctly

The graphite disc with the anode goes in first

You insert the red/orange wire (cathode) next to the minus sign and the green wire (anode) next to the plus sign.

Link the setup for the hacker board correctly. Remember that pin 3 and 4 remain empty.

An ____ is an organism that produces complex organic compounds from simple substances present in its surroundings, generally using energy from light (photosynthesis) or inorganic chemical reactions (chemosynthesis).

Types of autotrophs

Phototrophs use light as ____ source

Chemotrophs use electron donors from only inorganic sources as a source of energy

A heterotroph is an organism that uses pre-made organic carbon as food. If the heterotroph uses chemical energy, it is a chemoheterotroph; if it uses light for energy, it is a ____.

In aerobic respiration, oxygen (O2) is the terminal electron acceptor. In anaerobic respiration, other electron acceptors are used. Pick all that apply

Electrogenic bacteria are organisms that can transfer electrons to _____ during respiration, thus capable of generating electricity.

Pick all known electrogenic bacteria listed

In general, environmental bacteria of the genus Geobacter and Shewanella are considered promising electron generators

Microbial fuel cell (MFC) is a bioreactor that converts chemical energy present in the organic substrates to electrical energy through catalytic reactions of ____ or facultatively anaerobic microorganisms

Pick the best substrates that can be used to feed the microbial fuel cell

Microbial fuel cells work because anaerobic bacteria create a thin film on an electrode buried in soil or sediment. These electrogenic bacteria deposit their electrons onto the ____ material (graphite fibre)

Electrons flow through the wire from the anode to the cathode, where electrons combine with oxygen and hydrogen near the cathode to form water.

It is the circulation of the electrons from the anode to the cathode back to the soil that generates electrical current due to formation of a complete external circuit

Pick all items used in the lab experiment (by all)

The Anode and cathode are made of conductive graphite fibres, which can cause electrical short circuits. To prevent any damage, keep the conductive fibers away from other electronics and wear the included gloves during construction. These are

What are the electron transfer methods used by the microbes? Link the correct definitions.

Link the MudWatt components to their descriptions

This is the Cathodic reaction: CH₃COO- + 2H₂O ⟶ 2CO₂ + 7H⁺ + 8e^-

This is the Cathodic reaction: O₂ + 4e⁻ + 4H⁺ → 2H₂O

Complete this Anodic rxn: _____ + 2H₂O -> 2CO₂ + 7H⁺ + 8e^-

Complete the Cathodic rxn: O₂ + ___  + 4H⁺ → 2H₂O

Link the Cathode reaction correctly

Group the Anodic Reaction elements appropriately

At the anode, oxygen from the air is used to make water by combining with hydrogen from the soil digestion by the bacteria.