The peptidoglycan of bacterial cell walls contains a carbohydrate matrix linked together by short chains of:
A. fatty acids.
B. steroids.
C. nucleotides.
D. amino acids.
E. water molecules.
D. amino acids.
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Freezing food is an excellent preservation method because freezing readily kills most if not all microorganisms contaminating the food.
Answer the following statement true (T) or false (F)
The sudden, unexpected occurrence of a disease in a limited segment of a population is called a(n) ________.
A. epidemic B. sporadic disease C. outbreak D. incident
How did prions get from sheep to cattle?
a. Cattle were fed sheep parts as nutrient supplements. b. From humans infected with BSE. c. From humans infected with vCJD. d. From keeping sheep and cows in the same herd. e. Through a virus.
The underlying problem with cystic fibrosis is
A. the inability to transport chloride ions. B. mutations in the hemoglobin molecule. C. defective ganglioside molecules. D. the inability to metabolize certain amino acids. E. abnormal fat deposits around the heart.