Because hydrogen bonds are not as strong as covalent bonds, base pairings can easily be separated, allowing for replication and transcription. Because purines always bind with pyrimidines – known as complementary pairing – the ratio of the two will always be constant within a DNA molecule.
Llamamos pigmentos respiratorios a un grupo de proteínas que tienen la propiedad de combinarse de forma reversible con oxígeno molecular. Por esa razón, pueden transportar oxígeno, captándolo en un lugar y liberándolo en otro.
I think A would be the answer
Short Answer: A
Long Answer:
All the things listed in A are well known greenhouse gases. In 'B', there are no greenhouse gases, and 'C' contains no greenhouse gases either. (No gases)