The true pathogen (Salmonella/Shigella/Yersinia) is a non-coliform, non-motile, oxidase-negative member of the Enterobacteriaceae that does not produce hydrogen sulfide.
Fill in the blank(s) with the appropriate word(s).
Shigella
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The myoglobin protein, which carries oxygen in muscle cells, has only the first three levels of protein structure. What can you infer about myoglobin?
A. Myoglobin is made of nucleic acids B. Myoglobin lacks hydrogen bonds C. Myoglobin is made of only one polypeptide chain D. Myoglobin is not helical or pleated
A cell that is totipotent ____
a. has the potential to become any cell type of the adult b. induces nearby cells to follow a certain developmental pathway c. will never differentiate d. will not undergo determination e. has unregulated gene expression
In the process of peristalsis:a
waves of muscular contractions force food down the digestive tract. b. chemical digestion of food takes place in the digestive tract. c. food is discharged from the bodies of unicellular animals. d. digestion occurs intracellularly within food vacuoles. e. digestion of food takes place outside the body of an animal.
What happens to chromosomes in cells in which the telomerase gene is not expressed or is mutated?
What will be an ideal response?