SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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New mitochondria arise when existing ones grow. ATP production is called cellular respiration.
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New mitochondria arise only when existing ones grow and divide. ATP production is called cellular respiration.
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New mitochondria arise only when existing ones grow and divide. ATP production is called aerobic respiration.
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New mitochondria arise when existing ones grow. ATP production is called aerobic respiration.
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Detailed explanation-1: -Mitochondria arose through a fateful endosymbiosis more than 1.45 billion years ago. Many mitochondria make ATP without the help of oxygen.
Detailed explanation-2: -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).
Detailed explanation-3: -The ATP synthase is of ancient origin; the same enzyme occurs in the mitochondria of animal cells, the chloroplasts of plants and algae, and in the plasma membrane of bacteria and archea.
Detailed explanation-4: -Mitochondria originated by permanent enslavement of purple non-sulphur bacteria. These endosymbionts became organelles through the origin of complex protein-import machinery and insertion into their inner membranes of protein carriers for extracting energy for the host.