Answer the following questions true (T) or false (F)
1. Passive immunotherapy does not result in immunological memory.
2. For some bacterial diseases such as tetanus, it is more effective to produce an immune response against the bacterial toxin than against the bacteria.
3. Because attenuated live vaccines contain viruses that are less virulent, many booster vaccines must be given to produce an effective immune response.
1. TRUE
2. TRUE
3. FALSE
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If the age of the Earth is 4.6 billion years old, for what percentage of this time is Earth thought to have been anaerobic?
A. 0.1% B. 27% C. 44% D. 68% E. 99.3
Because microorganisms are nearly everywhere we can describe them as:
a. Aseptic b. Contaminated c. Ubiquitous d. Pure e. Inoculating
Two proteins associated with a rare neurodegenerative disorder have been sequenced. Protein A contains many polar amino acids with small regions containing nonpolar, hydrophobic amino acids
Protein B is rich in nonpolar, hydrophobic amino acids with only two small regions containing polar amino acids. What might this suggest about the two proteins? A) The two proteins may have different secondary structures. B) Protein A is fibrous and Protein B is globular. C) Protein A may be a cytoplasmic protein and Protein B may be a membrane associate protein. D) Protein A and Protein B are complementary parts of a supramolecular structure. E) Protein A is most likely and enzyme and Protein B is most likely a storage protein.
Four of the five answers listed below are organelles found in eukaryotic cells. Select the exception.