The minimal inhibitory concentration (MIC) is
A) The lowest concentration of a drug that visibly inhibits growth of the organism
B) The lowest concentration of a drug that kills the host
C) The lowest concentration of a drug that prevents growth of a particular pathogen
D) The lowest concentration of a drug that kills the pathogen
Ans: A) The lowest concentration of a drug that visibly inhibits growth of the organism
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Which of the following would have caused Mendel to observe patterns of inheritance that supported the model of blending inheritance rather than transmission of alleles causing discrete differences?
Comments: Mendel's observations of segregation, and subsequently independent assortment, were possible because he was observing traits with clear and discrete binary phenotypes caused by discrete alleles of single genes. When multiple genes influence traits, or multiple alleles are present, intermediate phenotypes are likely to occur. (As a note, all traits are affected by genotype and the environment, but the extent of environmental influence was minimized in Mendel's methods that involved observing plants raised in a single garden under very similar environmental conditions, thereby minimizing variation caused by fluctuations in the environment.) A. Mendel chose traits controlled by more than a single gene. B. Mendel chose traits controlled by a single gene, but that gene had more than two alleles affecting the phenotype. C. Mendel chose traits affected by both the genotype and the environment. D. All of the answer options are all correct.
What does evolutionary fitness measure?
A) physical health B) longevity C) relative reproductive success D) population size
In a large population of randomly reproducing rabbits, a recessive allele r comprises 80% of the alleles for a gene. What percentage of the rabbits would you expect to have the recessive phenotype?
A. 4% B. 64% C. 80% D. 32% E. 100%
Predict what would happen to the secondary structure of a protein if an alcohol that disrupts hydrogen bonding were added.
A.) nothing would happen to the protein; hydrogen bonding is not important for secondary structure B.) the beta sheets would unfold, disrupting protein structure C.) individual amino acids would be hydrolyzed from the protein, disrupting protein structure D.) the alpha helices would unfold, disrupting protein structure