The first stage in breaking down a glucose molecule, called glycolysis (splitting sugar), takes place outside the mitochondria in the cytoplasm of the cell. The Krebs cycle finishes the breakdown of pyruvic acid molecules to carbon dioxide, releasing more energy in the process.
Does glycolysis or Krebs cycle produce more ATP? how much atp is produced in krebs cycle.


Does glycolysis happen inside or outside of the mitochondria?

Does glycolysis occur inside or outside the mitochondria? Glycolysis happens in the cytoplasm of cells and does not require the presence of oxygen. It is said to be anaerobic.

Does glycolysis occur in mitochondria?

Glycolysis takes place in the cytoplasm. Within the mitochondrion, the citric acid cycle occurs in the mitochondrial matrix, and oxidative metabolism occurs at the internal folded mitochondrial membranes (cristae).

Does glycolysis occur inside or outside the cell?

Glycolysis occurs in the cytoplasm of cells and does not require the presence of oxygen.

Why is glycolysis outside of the mitochondria?

Glycolysis occurs outside of the mitochondria because that is an original metabolism, which existed in the eukaryotes before mitochondria were invented. The mitochondria is an extension of the glycolytic pathway. They take care of the electrons, and the Krebs cycle takes care of the ions that result from it.

Which process occurs inside the mitochondria?

The process is called oxidative phosphorylation and it happens inside mitochondria. In the matrix of mitochondria the reactions known as the citric acid or Krebs cycle produce a chemical called NADH. NADH is then used by enzymes embedded in the mitochondrial inner membrane to generate adenosine triphosphate (ATP).

What is glycolysis and where does it occur?

Glycolysis occurs in the cytoplasm and involves two stages which break up glucose – a 6-carbon molecule. … During the second stage, each of the 3-carbon compounds is oxidized to form pyruvate and net two molecules of ATP. Now let’s go into a little more depth, starting with one molecule of glucose in the cytoplasm.

Where does etc occur in the mitochondria?

The ETC requires oxygen, which means that it is an aerobic process. It takes place in the folds of the inner membrane of the mitochondria. These folds are called cristae.

Does etc occur in the mitochondria?

The ETC Links Chemical Energy to H+ Pumping Out of the Mitochondria. The ETC consists of an array of proteins inserted in the inner mitochondrial membrane.

What is the main transformation that occurs during glycolysis?

What is the main transformation that occurs during glycolysis? Glycolysis produces ATP, pyruvate, and NADH by oxidizing glucose.

How does glycolysis involved in energy formation?

Glycolysis is the first of the main metabolic pathways of cellular respiration to produce energy in the form of ATP. … Overall, the process of glycolysis produces a net gain of two pyruvate molecules, two ATP molecules, and two NADH molecules for the cell to use for energy.

What is the main transformation that occurs during glycolysis quizlet?

What is the main transformation during glycolysis? Glycolysis produces pyruvate, ATP, and NADPH by oxidizing glucose. During cellular respiration, glucose combines with oxygen to form carbon dioxide, water, and ATP.

Which process does not occur in the mitochondria?

Glycolysis is the only metabolic process of the choices listed that does not occur in the mitochondrion; it occurs in the cytoplasm. Citric acid cycle and Krebs cycle refer to the same process, which occurs in the mitochondrion.

What does the outer membrane of the mitochondria do?

The mitochondrial outer membrane separates the intermembrane space from the cytosol. The whole exchange of metabolites, cations and information between mitochondria and the cell occurs through the outer membrane.

What process occurs inside the mitochondria quizlet?

Which process occurs within the mitochondria? Krebs cycle.

Where does glycolysis take place in humans?

Glycolysis takes place in the cytoplasm of a cell as the first step in cellular respiration of the Kreb’s cycle. When glycolysis occurs, it breaks down glucose into pyruvic acids in the cytoplasm. There are many different kinds of pathways and processes that occur in our bodies.

Does glycolysis occur in the cytosol or cytoplasm?

Glycolysis occurs in the cytosol of cells. Once finished, the two pyruvate products are transported into the mitochondria to go through the citric acid cycle, at a cost of 1 ATP per pyruvate.

Where does glycolysis occur in a cell explain its different stages?

In the absence of oxygen, glycolysis allows cells to make small amounts of ATP through a process of fermentation. Glycolysis takes place in the cytosol of the cell’s cytoplasm. A net of two ATP molecules are produced through glycolysis (two are used during the process and four are produced.)

Where is the inner membrane of mitochondria?

The inner membrane forms invaginations, called cristae, that extend deeply into the matrix. The cristae define the third mitochondrial compartment, the crista lumen. The crista membranes contain most, if not all, of the fully assembled complexes of the electron transport chain and the ATP synthase (Fig. 2).

How do mitochondria reproduce?

Replication and inheritance. Mitochondria divide by mitochondrial fission, a form of binary fission that is also done by bacteria although the process is tightly regulated by the host eukaryotic cell and involves communication between and contact with several other organelles.

What are reactants of glycolysis?

Glycolysis is the first stage of cellular respiration, and the reactants are one molecule of glucose and two molecules of ATP (adenosine…

Which statement about glycolysis is correct?

Correct answer: Glycolysis is the first step of cellular respiration. It is responsible for the production of two ATP molecules, two pyruvate molecules, and two NADH molecules. Lactic acid is a byproduct of anaerobic respiration in skeletal muscle.

What molecule acts as an electron acceptor in glycolysis?

7. What molecule acts as an electron acceptor in glycolysis? NADH accepts electrons when PGAL converts to 1,3 BPG.

Which of the following are correct regarding glycolysis?

Correct answer: In glycolysis, glucose is broken down. 2 ATP are required for glycolysis to begin, resulting in a creation of 4 ATP.

Which one of the following pathways occur both in cytosol and mitochondria?

Pathway which takes place in cytoplasm and mitochondria is Glycolysis.

Does glycolysis occur only in prokaryotic cells?

Nearly all living organisms carry out glycolysis as part of their metabolism. The process does not use oxygen and is therefore anaerobic. Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells.

How does the location of glycolysis support this theory?

Glycolysis happens in the cytoplasm of all cells (prokaryotic and eukaryotic) which supports the idea that a large prokaryote cell (already doing glycolysis in its cytoplasm) engulfed an aerobic prokaryote cell (mitochondria). They are carrying high energy electrons, headed to the ETC Carbon Dioxide!

Can glycolysis occur without oxygen?

Glycolysis requires no oxygen. It is an anaerobic type of respiration performed by all cells, including anaerobic cells that are killed by oxygen. For these reasons, glycolysis is believed to be one of the first types of cell respiration and a very ancient process, billions of years old.

Which of the following is not a product of glycolysis?

Which of the following are not produced during the reactions of glycolysis? Explanation: The correct answer to this question is carbon dioxide. Carbon dioxide is not produced during glycolysis.

Where does glycolysis take place inside of the cell quizlet?

1:Glycolysis-Glycolysis takes place in the cytosol of a cell. Glucose molecules move into the cytosol, where a series of chemical reactions take place to produce molecules of pyruvic acid.

Why is glycolysis considered to be one of the first metabolic pathways to have evolved?

Why is glycolysis considered to be one of the first metabolic pathways to have evolved? … It relies on chemiosmosis, which is a metabolic mechanism present only in the first cells’ prokaryotic cells.

Why does the mitochondria have both an inner and outer membrane?

As previously mentioned, mitochondria contain two major membranes. The outer mitochondrial membrane fully surrounds the inner membrane, with a small intermembrane space in between. The outer membrane has many protein-based pores that are big enough to allow the passage of ions and molecules as large as a small protein.

Is the outer membrane of mitochondria permeable?

The mitochondrial inner and outer membranes have contrasting permeability characteristics. The outer membrane is non-specifically permeable to all low-molecular-weight solutes, whereas the inner membrane is impermeable except through specific transporters.

Why is the outer membrane of mitochondria permeable?

In contrast to the inner membrane, the outer mitochondrial membrane is freely permeable to small molecules. This is because it contains proteins called porins, which form channels that allow the free diffusion of molecules smaller than about 6000 daltons.