Answer: Hemoglobin is an iron containing protein composed of four polypeptide chain and made from 574 amino acids. It play a key role in oxygen transport from lungs to all parts of the body.
Mutation in hemoglobin: If mutation occurs in hemoglobin then glutamine amino acid is replaced by valine amino acid which lead to abnormal hemoglobin structure which is sickle shaped and can not pass through blood vessels resuting into deficiency of oxygen in the body and the disease called is known as sickle cell anaemia.
The nitrogenous bases guanine and adenine are called a. purines.
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There's multiple differences between the endotherms and the ectotherms, with the most important being:
- The endotherms maintain a constant body temperature, while the ectotherms's body temperature fluctuates with the environmental temperature.
- The endotherms have developed protection (hairs, feathers) from the outside influences, while the ectotherms do not have such accessories.
- The endotherms are warm-blooded, while the ectotherms are cold-blooded.
- The endotherms are usually bigger if the climate is colder, while the ectotherms are usually bigger if the climate is warmer.
- Endotherms are the mammals and the birds, while ectotherms are the reptiles and most of the invertebrates.