Answer:
The enzyme only binds to regions of DNA known as promoters, which have specific base sequences
Answer:
the dependent is how fast the coronavirus spreads. independent is whether the person works in a public space or not
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).
Almost always it's a case of opposites attract. In general metals give away electrons to the non metals on the right side of the periodic table. The metals have a + charge, the non metals have a - charge. Instant attraction. The attraction is pretty powerful: the ionic bond is among the strongest in chemistry.