1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
maxonik [38]
3 years ago
14

Fuel cells are a particular type of electrochemical cell that require a constant source of chemical fuels, or reactants, during

operation. one of the most common types of fuel cells is the alkaline fuel cell which uses hydrogen and oxygen as reactants.
Biology
1 answer:
bazaltina [42]3 years ago
7 0
A fuel cell works like a battery. It consists of two electrodes where the reactions would occur and an electrolyte solution which allows for caharged particles to flow. In a fuel cell that uses hydrogen and oxygen as reactants. The hydrogen would enter the cell at the anode where oxidation would happen. So that the species that is formed in the anode side would be hydronium ions and electrons. The oxygen, on the other hand, would enter the cathode electrode where reduction occurs. The species that are produced in this side of the cell are water molecules. Together, the net reaction is called a redox reaction.
You might be interested in
PLZ help ASAP!!!!!!!<br> WILL MARK BRAINLIEST FOR ONLY THE CORRECT ANSWER
Nadya [2.5K]

Answer:

DNA or RNA: Nucleic acid

Starches and sugars: Carbohydrates

Antibodies: Proteins

Can be utilized for energy if sugars are not available: Lipids

Hydrophobic part of the plasma membrane: Lipids

Glucose and sucrose: Carbohydrates

Explanation:

The DNA or RNA can be described as molecules made up of nucleic acids.

Carbohydrates can be described as biological molecules made up of carbon, hydrogen and oxygen. For example, starches, sugars, glucose, sucrose etc

Antibodies can be describe as a type of proteins which provide the body with immunity.

Lipids or fats are the alternative source of energy if carbohydrates are not present.

The hydrophobic tail of the plasma membrane is made up of fatty acid molecules which are lipids.

5 0
3 years ago
2. In gluconeogenesis, it takes two enzymes to convert pyruvate to phosphoenolpyruvate. a. Explain what is happening chemically
Marina CMI [18]

Answer:1. Pyruvate carboxylase

2. Phosphoenol pyruvate carboxy kinase

Explanation:

The conversion of pyruvate to phosphoenol pyruvate is catalyzed by two enzymes Pyruvate carboxylase and phosphoenol pyruvate carboxy kinase

1. Pyruvate carboxylase reaction

Pyruvate in the cytoplasm enters the mitochondria. Then, carboxylase of pyruvate to oxaloacetate is catalysed by a mitochondrial enzyme, pyruvate carboxylase. It needs the co-enzymes biotin and ATP.

The oxaloacetate formed has to be transported from the mitochondrial to the cytosol because further reaction of gluconeogenesis are taking place in cytosol.

2. Phoaphoenol pyruvate carboxy kinase (PEPCK)

In the cytoplasm, PEPCK enzyme then converts oxaloacetate to phoaphoenol pyruvate by removing a molecule of CO2. GTP or ITP donates the phosphate group.

The net effect of these two reactions is the conversion of pyruvate to phoaphoenol pyruvate. This circumverts the irreversible step in glycolysis catalyzed by pyruvate kinase (step 9 if glycolysis)

5 0
3 years ago
Sweat, mucus, tears, and saliva all contain ____________ that kill pathogens.
hichkok12 [17]
Sweat, mucus, tears, and saliva all contain enzymes that kill pathogens.
7 0
2 years ago
Write a claim: Can mixtures be separated?<br><br> Please I need this done by tomorrow!!
aliina [53]

Answer:

Yes, mixtures can be separated using a variety of techniques.

4 0
2 years ago
Read 2 more answers
Assume that the growing polypeptide chain of amino acids being produced represents an enzyme humans use to help digest starch. T
arlik [135]

Answer:

B) nuclei of gland cells.

Explanation:

DNA carries the blueprint for the production of all the proteins including enzymes in human beings. Humans are eukaryotes and their DNA is present in the nucleus of their cells. All the cells that make the complex human body are derived from division in the zygote and therefore, are genetically identical and have the same DNA.

However, gene expression is regulated by the expression of specific genes in specific cells and at a different time of developmental stages. Amylase is the enzyme that digests starch in humans. Amylase is secreted by salivary glands. So, the nuclei of these glands would have genetic information for the synthesis of amylase.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which species seem the least alike?
    12·1 answer
  • What would happen if there were no enzymes in the human body
    8·1 answer
  • Which of the following is not a characteristic of a prokaryote
    11·2 answers
  • Which statement best summarizes Gregor Mendel's contribution to science? Question options:
    14·2 answers
  • Feelings are often recognized by nonverbal changes, such as blushing.​ <br> a. True <br> b. False
    11·1 answer
  • Which one of the following pollutants is responsible for the increase in skin cancer?
    13·2 answers
  • Which is required for the information of sedimentary rock
    7·1 answer
  • What do the term phycobiont and mycobiont signify ?​
    12·1 answer
  • 20 pl
    13·1 answer
  • PLEASE HELP ME WILL MARK BRAINLIEST LIKE GIVE ME THE REAL ANSWER
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!