Answer:
A. The two proteins are very likely related evolutionarily.
B. The differences in the sequences in many instances represent a conservative change (such as L for I).
Explanation:
A. Humans and sperm whales are vertebrates and mammals, this implies that they have a common ancestor a long time ago, which makes them evolutionary related.
B. Conservation indicates that a sequence has been maintained by natural selection. This means that protein structure is not exactly the same but is quite similar.
Options C and D, contradict the above explanation, and they make no sense because sperm whales and humans share a common ancestor (mya).
Metaphase 1 would be when homologous chromosomes line up in the middle of the equator.
Answer:
The correct answer is b. likely to be found in beta turns.
Explanation:
Proline is the amino acid which is unique from other amino acids as the side chain of proline is connected which gives it a cyclic structure. Beta turns are the secondary structure found in proteins that helps in the changing of direction of polypeptide chain in the protein.
The amino -acid proline is commonly found in beta turns because the unique cyclic structure of proline suits the beta-turn organization. Glycine is another amino acid that is abundant in beta turn because of its small size.
Therefore the correct answer is b. likely to be found in beta turns.