The food vacuoles and phagocytic vacuoles are most similar to
A. chloroplasts.
B. lysosomes.
C. Golgi apparatus.
D. mitochondria.
Answer: B
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Fermentation is sometimes used as a means of slowing food spoilage. Why would fermentation lead tothis outcome?
A. Fermentation is THE process that directly reduces sugars in food. Without sugars, bacteria cannot grow and spoil the food. B. Fermentation will lead to production of high levels of ethanol (95% or higher!)-ethanol will kill bacteria. C. Fermentation will lead to production of acidic by-products, dropping the pH of the food below a level that bacteria can tolerate. D. This is a trick question-fermentation actually IS food spoilage and cannot be used to prevent it under any circumstances.
Life probably originated during which geologic time?
a. Archaean b. Cenozoic c. Mesozoic d. Carboniferous e. Pennsylvanian
Duchenne muscular dystrophy (MD) is inherited from an X-linked recessive allele. What is the probability that a son with Duchenne MD inherited this disease from his biological father?
a. 0 b. 1/4 c. 1/2 d. 1/8 e. 1/16
If a spontaneous mutation introduced a new allele into a population's gene pool at a chromosomal locus that had previously been static, which of the following would experience the largest change in value as a result?
(A) Average number of gene loci per chromosome (B) Average frequency of heterozygosity in the gene pool (C) Nucleotide base-pairing variability at the site of the wobble effect in codon-anticodon recognition (D) Geographic variability