A physician takes a biopsy, or tissue sample, from the skin of a patient. Which observation of the cells in the tissue would most strongly support the conclusion that the patient has skin cancer? A. Many cells in the tissue sample appear identical to one another.
B. All of the cells are packed closely together.
C. Some of the cells were dead when the biopsy was obtained.
D. A group of cells appear larger and rounder than surrounding cells

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

What materials must dams have to produce electricity, and what must occur?