Answer:
B. Rotations of Earth
Explanation:
The Earth's rotations create both ocean currents and atmospheric movement (wind). This is called the Coriolis force.
A bullet slowing down the further it travels is an example of acceleration
Answer:
3.14 residues
Explanation:
This kind of sheets has the particularity that the distance between adjacent residues is 3.5 Angstroms. Furthermore, there are two residues per cycle.
Hence, we can calculate easily the number of residues in a segment, by using the expression:
Nr = (256 Å) / (3.5 Å/residue) = 3.14 residues
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The right answer is The digestion of DNA by restriction enzymes.
The fragmentation of the DNA is done by bacterial enzymes called restriction enzymes.
Restriction-enzymes (or endonucleases) recognize and cut the DNA into a specific sequence. These enzymes are naturally produced in bacteria as a defense against bacteriophages - viruses that infect bacteria. The bacterial restriction enzymes cut the DNA of the invasive bacteriophage while leaving the bacterial genomic DNA healthy and safe through the addition of methyl groups.
These enzymes are used in practice at the laboratory level to explore DNA.
