A DNA molecule consists of two stands of nucleotides that wind around each other like a twisted ladder with a phosphate and sugar backbone. The nitrogenous bases are divided into two groups called the pyrimidines and the purines. The pyrimidines include the thymine and cytosine, the purines are adenine and guanine. The nitrogenous bases in the double helix are bound together according to the base pairing rule. Adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C). The student either drew the base pairing showing adenine and thymine or guanine pairing with cytosine.
Answer:
True or false: Typically, once a protein is synthesized in a healthy cell, it will perform its function indefinitely because the cell environment is highly controlled.
=
False
Answer:
It shows the three organisms to have evolved from a common ancestor.
Explanation:
An identical sequence of amino acids for cytochrome c in cows, pigs and sheep show that they most likely evolved from a common ancestor. The common ancestor might have evolved over time and in result, three different species were produced. It also shows that they are more closely related to one another than other organisms.
Other properties or traits that are common in these organisms are :
They all are mammals.
They are all livestock animals.
They all are multicellular organisms.
