Answer:
C is the correct option.
Explanation:
Glycolysis is the standard way for the formation of acetyl-CoA, from glucose.
Second, beta-oxidation of fatty acids generates 2 acetyl-coA molecules per cycle.
Finally, the degradation of amino acids generates intermediates of the Krebbs cycle. Occasionally Leucine, tryptophan and isoleucine are directly catalysed in acetyl-CoA.
They both are constituents of DNA.
Adenine, cytosine, guanine and thymine are the glue that holds together the two sugar-phosphate strands which form the back-bone of DNA. The order in which these bases occur is what stores the information in DNA.
Answer: Possession of Valves
Explanation: Veins possess valves which ensures that blood flows in only one direction. Valves helps blood to flow back to the heart against gravitational force.
Arteries don't have valves because the pressure originating from the heart is capable of causing the blood to flow in one direction.
