Which of the following statements concerning bacterial growth at high temperatures is not true?
A) High temperatures denature enzymes
B) High temperatures are microbistatic
C) High temperatures are microbicidal
D) High temperatures destroy lipids
B) High temperatures are microbistatic
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Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
Recent research has demonstrated a correlation between the presence of certain types of Gram-positive bacteria in the human gut with obesity and type 2 diabetes. These findings best support which of the following statements?
A. The presence of Gram-positive bacteria in the human gut causes obesity and type 2 diabetes. B. Gram-positive bacteria compose the majority of normal microbiota in the human gut of people with obesity and type 2 diabetes. C. Obesity and type 2 diabetes is caused by normal microbiota in the human gut. D. Normal microbiota may significantly impact human health and disease.
Roberts Syndrome is an extremely rare genetic disorder that is characterized by mild to severe prenatal retardation or disruption of cell division, leading to malformation of the bones in the skull, face, arms, and legs. Shown below is a pedigree for a family with Robert’s Syndrome. What is the genotype of individual II-C? (R = wild type; r = Robert's syndrome)
A. RR
B. rr
C. Rr
D. R
E. r
Suppose that the bottom of an ocean floor is disrupted, and bits of algae along with other bottom-dwelling microorganisms are scattered about into the ocean water. Which organism would be able to take the best advantage of this temporary food source?
A) sponges B) cnidarians C) parasitic flatworms D) soil-dwelling nematodes