The function of a protein is dependent upon the shape into which the chain of amino acids folds. Many noncovalent interactions are responsible for maintaining the protein's shape. Assume you have isolated a protein from an organism in its proper shape, and you have treated it with an enzyme that selectively targets and breaks only the peptide bonds in the proteins. Would the protein retain its shape under these conditions?

a. Yes; once noncovalent bonding determines the shape of a protein, the peptide bonds are no longer necessary.
b. Yes; because the noncovalent interactions that determine the shape of a protein are stronger than the peptide bonds.
c. No; while the noncovalent bonds determine the shape of a protein, the peptide bonds are required to hold the amino acids together.
d. Yes; but the shape would be affected to a greater extent by changes in temperature.

c). No; while the noncovalent bonds determine the shape of a protein, the peptide bonds are required to hold the amino acids together.

Explanation: Peptide bonds is a type of bond that covalently joins two or more amino acid molecules through a substituted amide linkage. Peptide bond is formed by the removal of the elements of water from the alpha carboxyl group of one amino acid and the alpha-amino group of another amino acid. When two amino acids molecules are joined by peptide bond, the resulting molecule is called a dipeptide, when three amino acids molecules are linked by two peptide bonds, a tripeptide is formed. When a few amino acids are joined by peptide bonds, the structure is called an oligopeptide, when many amino acids are joined, the product is called a polypeptide.

Since the enzyme breaks the peptide bonds, it means that the protein has been broken down into its constituent amino acid, therefore the protein has lost its primary structure and therefore will no longer retain its shape.

The correct answer is b a mutation in a gene that codes for protein regulating cell division.

Explanation:

In general, tumors occur when cells divide and grow excessively in the body. Normally, the body controls cell growth and division. New cells are created to replace older ones or to perform new functions. DNA Synthesis (S phase)

In many cancer cells the number of chromosomes is altered so that there are either too many or too few chromosomes in the cells. These cells are said to be aneuploid. Errors may occur during the DNA replication resulting in mutations and possibly the development of cancer. trumer develops when cells in the body divide and grow at an excessive rate. Typically, the body is able to balance cell growth and division. When old or damaged cells die, they are automatically replaced with new, healthy cells. In the case of tumors, dead cells remain and form a growth known as a tumor. Cancer is a disease that result due unregulated cell divison.There are many tumor suppressor protein present in our body such as retinoblastoma tumor suppressor protein,p53 protein.

    These tumor suppressor protein helps to carry out cell divison in a regulated fashion and send signal for division only to that cell that have undamaged DNA.

  Mutation in the gene encoding tumor suppressor protein leads to development of cancer.