The word "vaccination" is derived from the Latin word "vacate" which means
a. inject
b. smallpox
c. immunization
d. cow
e. pustule
Answer: d. cow
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Answer the following statements true (T) or false (F)
1. Cells can sense changes in the environment through alterations in the extracellular matrix. 2. Wrinkling observed with aging is do to low production of the extracellular matrix molecule, fibronectin. 3. Blood vessels that can expand and contract are largely composed of collagen as a structural extracellular matrix protein. 4. Glycosaminoglycans and proteoglycans resist compression and are found in large abundance in joints of the body. 5. Cellulose from the cell wall is a primary energy store for plants.
Describe the basic structure of normal adult hemoglobin and the abnormality observed in sickle-cell hemoglobin
What will be an ideal response?
Protein interaction networks may be characterized by all of the following approaches except
a. gentle isolation followed by mass spectrometry. b. shotgun sequencing of random DNA clones. c. screening for protein interactions in vitro. d. the yeast two-hybrid method.
A small puncture wound on a woman's arm has become swollen, hot to the touch, and intensely painful. There is tissue necrosis but it is not "gassy," and under the microscope Gram-positive cocci in chains are present. Which of the following microbes is
likely to be responsible? A) Streptococcus pyogenes B) Staphylococcus aureus C) Pseudomonas aeruginosa D) Clostridium perfringens E) Sporothrix schenckii