Answer:
At its last stage
Explanation:
Mitosis is complete when it has finished its last stage, which is known as telophase. During telophase, the chromosomes or the genetic material are already separated on opposite sides of the large cell. When this happens, the chromosomes begin to be enveloped in their own separate nuclei.
Answer:
b. Covalent bond between R groups
Explanation:
Disulfide bridge also known as disulfide bond or dicysteine bond is a type of interaction in which two cysteines of proteins come in close proximity with each other and form covalent bond with their functional (R) groups. The purpose of this bond is to stabilize the tertiary structure of a protein and make it more compact.
Please see the attached image for more understanding.