In a particular E. coli strain, a mutation in the thiMD operon results in improper formation of the stem loop secondary structure making it impossible to bind TPP. There are two enzymes encoded by the thiMD operon
How many of the enzymes encoded in the thiMD operon are translated?
A. two
B. zero
C. three
D. one
A
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Gingko trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Gingko trees in China must behave the same way. These statements are an example of:
A. inductive reasoning B. deductive reasoning C. a theory D. an experiment
In humans, ability to roll the tongue (R) is dominant to being unable to roll (r). Having freckles (F) is dominant to having no freckles (f). A freckled tongue-roller could have which of the following genotypes?
A. RRFF B. RrFf C. rrFF D. RRFF and RrFf only E. all of the answer options are correct
Which of the following does NOT influence the pH of extracellular fluids?
a. respiration b. a high protein diet c. bicarbonate ions d. excretion of filtrates e. phosphate and ammonia ions
The initial circumstance that led some to believe that Abraham Lincoln had Marfan syndrome was that ____ had the
disease. a. one of Lincoln’s descendants b. Lincoln’s sister c. a descendent of Lincoln’s great-great-grandfather d. DNA analysis on Lincoln’s skull determined that he e. Photographs of Lincoln provided physical evidence that he