The mRNA is translated in the 3? to 5? direction in
A) bacteria.
B) eukaryotes.
C) archaea.
D) eukaryotes, bacteria, and archaea.
E) None of these.
Answer: E
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What is the most likely reason the peronsporomycetes were originally thought to be fungi?
A. Life cycle similar to that of many fungi B. Yeast like cellular morphology C. Cell wall composition D. Macroscopic appearance of fuzzy growth
Meiosis occurs in the ____
a. testes only b. ovaries only c. somatic cells d. synaptonemal complex e. gonads
In certain areas of the world where there's a high incidence of malaria, there's also a high incidence of sickle-cell anemia. Sickle-cell anemia results from a mutation in the gene that codes for hemoglobin
Malaria is an infectious disease carried by mosquitoes. Both malaria and sickle-cell anemia can be fatal. If an individual is homozygous for normal hemoglobin, they're more prone to malaria. If an individual is homozygous for sickle-cell hemoglobin, they'll develop sickle-cell anemia. However, if an individual is heterozygous and possesses one allele for normal hemoglobin and one allele for sickle-cell hemoglobin, they're less prone to malaria and won't develop sickle-cell disease. What description applies to this example? A) Being heterozygous can result in greater fitness for an individual. B) Inbreeding depression can result in reduced rates of survival. C) Genetic drift can occur in small populations. D) Homozygous individuals are often unhealthy.
Which microbe is most likely to survive the grilling during your spring break vacation?
a. gram + streptococcus b. gram - e coli c. bacillus endospore d. human immunodeficiency virus