Which of the following is a bacterium known

to cause stomach ulcers?



a. Clostridium botulinum
b. Staphlococcus aureus
c. Escherichia coli
d. Helicobacter pylori
e. Lactobacillus acidophilus


D

Biology & Microbiology

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Many metabolic pathways are ultimately concerned with ATP; either with the generation of ATP, or with the requirement of ATP for that pathway to function.  Why is ATP so important to metabolism?  

A.  Hydrolysis of ATP is used to drive exergonic reactions B.  Hydrolysis of the bond between adenine and ribose in ATP is commonly used to release energy that can be used to drive other cellular reactions C.  The phosphate groups of ATP are held together by unstable bonds that can be broken to release energy D.  ATP is a protein that serves as the energy currency of cells

Biology & Microbiology

In regions of a chromosome that encode highly structured RNA molecules, what sequence characteristics would you expect to find?

A. an abundance of pyrimidines, which play an important role in three-dimensional folding of RNA B. an abundance of uracil, which plays an important role in three-dimensional folding of RNA. C. multiple short segments capable of base pairing with adjacent or distant regions of the sequence. D. heavy methylation of these gene sequences, preventing their expression E. very little in the way of sequences that can form double-stranded helices

Biology & Microbiology

The organisms that obtain energy by oxidation of hydrogen sulfide and use carbon dioxide as a carbon source are called

A. heterotrophs. B. chemoheterotrophs. C. autotrophs. D. chemolithoautotrophs.

Biology & Microbiology

Which hypothesis has been proposed to explain the evolution of eusociality?

A) the haplodiploidy hypothesis B) the Monogamy hypothesis C) the ecology/life history hypothesis D) All of the above.

Biology & Microbiology