DNA is present within the nucleus of the cells and it is responsible for the production of various proteins and enzymes to keep the cellular activity going on. However, it cannot directly do so and seeks help of the messenger RNA molecules. DNA transcription is a process that involves transfer of the DNA code from the DNA to the mRNA molecule for the production of proteins.
Getting to see and investigate the creatures of the past
The answer is A
(don't quote me on it)
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The answer would be Haemoglobin.
The Haemoglobin is a red pigment found in RBCs of vertebrates that helps to transport oxygen to various tissues.
Vertebrate blood is bright red when it is oxygenated and dark red when it is deoxygenated. Some animals such as crustaceans or mollusks, use haemoglobin to carry oxygen instead of hemoglobin.
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