Why do biologists believe glycolysis evolved before the krebs cycle and the electron transport chain?

Biology

1 answer:

ollegr [7]3 years ago

4 0

Answer:

Glycolysis evolved before Kreb's cycle and Electron Transport chain. This view is supported by following facts:

Glucose cannot enter the mitochondria and it needs to be broken down into pyruvate in the cytosol by the process of glycolysis.
Pyruvate then forms acetyl CoA that enters the mitochondria where it undergoes Kreb's cycle.

The Electron transport Chain occurs by passing of electron and finally donating it to the electron acceptor oxygen. The molecules of NADH produced in the preparatory phase of glycolysis provides the electron for electron transport chain.

Thus Glycolysis must have evolved before Kreb's Cycle and Electron Transport Chain otherwise the raw materials for both the processes would not have been available.

You might be interested in

Classification Activity Worksheet Instructions: Read each myth (untruth). Reword it to make a factual statement. Then, give two

NeX [460]

Answer:

I don't think there is a #6, so I'm gonna answer the "Mammals and plants don't belong in the same domain".. If this is the wrong one I can help with the one you actually need help with.

Explanation:

Myth: Mammals and plants don't belong in the same domain.

Fact: Mammals, being a group of animals do not belong in the same domain as plants. Evidence: All living organisms are divided into three domains: Bacteria, Archaea and Eukarya. All of the organisms that possess a eukaryotic cell, plants, animals, protists, and fungi are in the Eukarya domain. Therefore, mammals and plants belong to the same domain, the Eukarya domain.

6 0

3 years ago

The term catalyst comes from the greek catalysis, meaning dissolution. give reasons that this term is appropriate in describing

Masja [62]

Enzymes are meant to break down food in the mouth making it easier to consume and the food and gather the nutrients inside

8 0

2 years ago

When you examine fluid that you have drawn from a blood vessel in someone's arm, you find that it is relatively high in carbon d

ziro4ka [17]

Answer:

The given blank can be filled with a venule.

Explanation:

A small blood vessel in the microcirculation, which connects the capillary beds to the veins is known as the venules. Various venules combine to form a vein. The walls of a venule are formed of three layers, that is, the inner endothelium formed of squamous endothelial cells, a middle layer of elastic and muscle tissue, and an external layer formed of fibrous connective tissue.

The size of a venule ranges from 8 to 100 micrometers in diameter and are produced when capillaries come in close association. A venule refers to a small blood vessel that permits the deoxygenated blood high in carbon dioxide and waste products to return from capillary beds to the bigger blood vessels known as veins.

4 0

3 years ago

Rosa uses a microscope to look at a group of cells she she sees that the cells are joined together so she knows that they are fr

Vesna [10]

Maybe a plant or a fungus.

0 0

3 years ago

Read 2 more answers

See picture:

Sidana [21]

Missense Mutation. A nucleotide was substituted for another- and most importantly- changes the final amino acid.

8 0

2 years ago