A blanket from a child with chickenpox is likely to be contaminated with the virus that causes chickenpox (Varicella-zoster virus). What is the blanket called?
A) fomite
B) host
C) pathogen
D) vector
Ans: A) fomite
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What type of bonding is responsible for maintaining the shape of the tRNA molecule shown in the figure above?
A) covalent bonding between sulfur atoms B) ionic bonding between phosphates C) hydrogen bonding between base pairs D) van der Waals interactions between hydrogen atoms E) peptide bonding between amino acids
Indwelling catheter biofilm infections are more resistant to antibiotics than nonbiofilm infections.
Answer the following statement true (T) or false (F)
Experiments like those performed by Stanley
Miller in the 1850s demonstrated
a. that DNA forms readily and produces itself. b. that organic compounds required for life can form under artificial conditions. c. that prokaryotic cells can form under artificial conditions. d. that meteorites contain the building blocks of life. e. that reactions in hydrothermal vents synthesis organic molecules
Which of the following is NOT a component of DNA?