Does cellular respiration have to be catalyzed by enzymes?

Enzymes can only play a catalytic role in the metabolism of living cells, and the reason why cells can quickly and quickly carry out respiration to maintain life activities is the catalytic effect of enzymes. Therefore, the enzyme can only speed up the reaction rate, which is equivalent to a catalyst. Therefore, enzyme-free cells can also breathe, but the rate is thousands or even tens of thousands of times slower, so that the cells cannot maintain normal life activities. Hehe.

1. Respiratory enzymes point out that the enzyme that reacts directly with oxygen is hemoglobin. Touch the boy and call it a respiratory enzyme. Later, it was also called oxytransferase.

Equivalent to cytochrome oxidase. When Lycopterium performs aerobic respiration, electrons and hydrogen ions must be transferred through the respiratory chain to produce ATP. The respiratory chain is composed of succinate dehydrogenase, Nadh2 dehydrogenase, cytochrome oxidase, etc.

These enzymes are all distributed on the membrane.

2. Cytochromes are electron-transfer proteins with iron porphyrins (or heme) as auxiliary groups, which are widely involved in the redox reactions of animals, plants, yeasts, aerobic bacteria, anaerobic photosynthetic bacteria, etc. The way in which cytochromes transport electrons as electron carriers is through reversible changes between the reduced (Fe2+) and oxidized (Fe3+) states of the iron atoms in their heme prosthetic groups. Any type of cellular protein (heme protein) plays an extremely important role in cellular energy transfer.

Cytochromes can be divided into 3 categories based on the wavelength of the light they absorb, and at least 30 different cytochromes have been identified.

The chemical nature of respiratory enzymes is proteins.

First, a polypeptide chain with a certain amino acid sequence is synthesized from the free ribosomes in the cell, and then processed by the endoplasmic reticulum (such as glycosylation) and reprocessed by the Golgi apparatus (such as modification) to form a mature protein with a certain spatial structure.

a. Mature red blood cells in the human body do not have mitochondria and cannot undergo aerobic respiration, but can undergo anaerobic respiration, a. is wrong;

b. Cellular respiration is the process of oxidative decomposition of organic matter in the cell to release energy, which requires the catalytic action of enzymes, B is correct;

c. Prokaryotic cells that undergo aerobic respiration are not mitochondria, and the place where pyruvate is completely oxidized and decomposed is not mitochondria, c is wrong;

d. The decomposition of substrates during anaerobic respiration also belongs to oxidation reactions

a. Regardless of aerobic respiration or anaerobic respiration, the decomposition of organic matter must be carried out under the catalysis of enzymes, a correct;

b. Human hard bone tissue cells are living cells and can also breathe, b is correct;

c. Yeast can carry out aerobic respiration and anaerobic respiration, aerobic respiration produces carbon dioxide and water, and anaerobic respiration produces alcohol and carbon dioxide, c correct;

d. Mesophyll cells carry out photosynthesis under light, and also carry out respiration

a. Regardless of whether there is hidden oxygen respiration or fociless anaerobic respiration, the decomposition of organic matter must be carried out under the catalysis of enzymes, a correct;

b. Human hard bone tissue cells are living cells and can also breathe, b is correct;

c. Yeast can carry out aerobic respiration and anaerobic respiration, aerobic respiration produces carbon dioxide and water, and anaerobic respiration produces tendane alcohol and carbon dioxide, c correct;

d. Mesophyll cells carry out photosynthesis under light, and also carry out respiration

a. Respiration is enzymatic anti.

The source should be catalyzed by enzymes

to be able to complete, a correct;

B. Protonucleus cells without granules