The plasma membrane envelops the absorbed molecules.
Peptide bonds form through
hydrolysis or the removal of a water molecule (H₂O). Explanation:Two or more amino acids are
combined by generating peptide bonds, which ultimately lead to the creation of
polypeptides. These peptide bonds exhibit a
covalent nature and necessitate water, involving an
amino group and
a
carboxyl group. Hydrolysis of these components results in the formation of long-chain amino acids.
The arrangement of the amino acid sequence begins with the α-amino group residue and concludes with an α-carboxyl group at the end. This arrangement is referred to as the primary structure of the protein molecule.
The physical contaminant is hair.
FURTHER EXPLANATION
Contaminants are any substances present in food that shouldn't be there. These contaminants fall into several categories: biological, physical, and chemical.
Biological contamination involves harmful agents like bacteria, viruses, or yeast that can cause illness if consumed. These are considered biological hazards.
Physical contaminants refer to tangible items that might inadvertently enter food, such as hair, fingernails, metal fragments, glass pieces, insects, jewelry, etc., which can present physical dangers that may injure someone who eats the contaminated food. These physical contaminants can occur during any stage of food processing and preparation.
Chemical contaminants consist of substances that must not be mixed with food or are present in excessive amounts, such as pesticides, insecticides, and cleaning agents. These are considered chemical hazards because they can lead to sickness or poisoning if ingested.
Based on that explanation, we can classify the options as follows:
- Hair - physical contaminant
- Salmonella - biological contaminant
- Insecticide - chemical contaminant
- Botulism - a serious illness caused by consuming improperly prepared food contaminated with a dangerous toxin.
LEARN MORE
- food safety
- food hazards
- pest control in food establishments
Keywords: contaminants, food hazards
