DNA is a double stranded molecule. Covalent and hydrogen bonds pray important roles in the functioning of DNA molecules.
Covalent bonds occur within each linear strand and strongly bond the nucleotide bases, sugars, and phosphate groups occurring both within each component and between components.
Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing.
Hydrogen bonds helps the complementary base pairs in DNA; guanine with cytosine and adenine with thymine to connect to one another. The hydrogen bonds between these complementary pairs helps keep the two strands of DNA helix together.

6 0

3 years ago

An outbreak of food poisoning occurs at a family picnic after the growth of Staphylococcus aureus in refrigerated potato salad l

kozerog [31]

Answer:

clusters of round shape bacteria

Explanation:

Microscopic examination of the potato salad should reveal clusters of round shape bacterium.

Staphylococcus or Staphylococcal are those that are round in shape (from the word 'coccus') and occur in clusters as opposed to individually or in chains. The word is derived from two Greek words - staphyle which means bunch of grapes and kokkos which means to be round.

Hence, when a magnified image of the Staphylococcus aureus is produced by the microscope, clusters of round shape bacteria would be seen.

3 0

3 years ago