Question

PLEASE HELP!!!!!!
What process occurs in the first stage of cellular respiration?

Electron transport begins.
Glucose is broken down.
Oxygen is taken in.
The Krebs cycle is completed

Answer 1

so have you tried googling yet?

Answer 2

yeah i just keep getting atp

Answer 3

i have a feeling its mihgt be the krebs cycle

Answer 4

okay, tell me what is kreb cycle? what happens there?

Answer 5

aint it a part of cellular respriation

Answer 6

something like that

Answer 7

that doesn't tell me much tho
details, go for details. What happens in Krebs cycle?

Answer 8

alright first let me finish the last bight of my asigntment

Answer 9

ok, as u wish

Answer 10

alright

Answer 11

the krebs is the sequence of reactions in which most living cells generate energy during respiration and adp being converted to atp

Answer 12

imma chose break down of glycose

Answer 13

Respiration is the process by which cells obtain energy from glucose. During respiration, cells break down simple food molecules, such as sugar, and release the energy they contain. Respiration is carried out continuously by plant cells, as well as animal cells. This process begins in the cytoplasm, where molecules of glucose are broken down into smaller molecules. Oxygen is not involved, and only a small amount of energy is released. Next, the process moves on to the mitochondria, where the small molecules are broken down into even smaller molecules. These chemical reactions require oxygen, and they release a great deal of energy. This energy is still stored in the form of chemical energy, but now it is stored in molecules that are readily used by the cell. The three final products are carbon dioxide, water, and energy.
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Cellular respiration is a cellular process that requires oxygen and gives off carbon dioxide in order to obtain energy for the organism. That's a brief meaning so see the Related Link below for more info.

In brief, there are 3 stages: Glycolysis, the Kreb's Cycle, and Oxidative Phosphorylation (or Electron Transport Chain). Cellular respiration takes place near or in the mitochrondria, an organelle in all eukaryotic cells.

In Glycolysis, a sugar is taken in and, through a bit of energy stored in Adenosine Triphosphate (ATP), it gives off some electrons which are stored, and it splits into Pyruvic acid.

In the Kreb's Cycle, the Pyruvic acid gives off more electrons and cycles through, some of it becoming carbon dioxide.

In Oxidative Phosphorylation (Electron Transport Chain), the stored electrons "pump" hydrogen cations (positive ion) to one side of the inner mitochondria membrane. Due to the high concentration, the hydrogen cations flow back through a protein that makes a lot of ATP. For every sugar molecule, it makes about 60 of these. The oxygen is taken in here to take care of the hydrogen ions- it becomes water.
it converts energy in food into a more usable form!
sources: http://www.answers.com/Q/What_is_cellular_respiration

Answer 14

indeed but again, this is just description
Kreb cycle to be short is basically a set of reactions that utilizes the pyruvate compounds and during this utilization process we generate electrons that are taken up by Electron transporters and then this transporter goes into next stage of respiration which is Electron Transport chain - here the electrons + Hydrogen ions play role in generating ATP as a final product

Answer 15

Now before you get Pyruvate, you need glucose, and 1 glucose is broken down to 2 pyruvates
this process is called Glycolysis

Answer 16

Oxygen that we take in is needed in the last step of these sets of reactions, when you need to make ATP, so are in involved in electron transport chain.

Answer 17

i got that question right

Answer 18

yeah, coz u guessed it right there