Well answer e is just plain gross. I would go with c.
Fingernails are made of protein and keratin. Gypsum is softer than a fingernail.
Simple, organelles. Organelles function as small organs inside cells, they perform various important task such as protein and lipid synthesis, aid in cell and DNA replication and others.Thank you for your question. Please don't hesitate to ask in Brainly your queries.
The correct answer is A. <span>Using the same restriction enzyme for cutting the desired gene and the vector and using ligase for pasting the gene into the vector. Vectors ensure DNA replication in cells. Restriction enzymes slice the DNA in specific sites; it should be the same so as the two ends will easily complement back together. </span>
Amino acids are joined by peptide bonds in a polypeptide chain. A peptide bond is one in which the molecules of a carboxyl react with the amino group of another molecule. A molecule of water is then formed and release, leaving the functinal groups to bond together and form a polypeptide chain.