During ventricular systole, the semilunar valves ________ and the AV valves ________

A) open; open
B) close; open
C) open; close
D) close; close


Answer: C

Biology & Microbiology

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After analysis of 100 pedigrees, the Zmax from the analysis of linkage between a disease gene D and the DNA marker P was found to be 3.5 at ? = 0.25. Which of the following is the best interpretation of these results?

A) No conclusion can be made regarding linkage of D and P. B) The evidence supports linkage of D and P at 25 cM. C) The evidence supports linkage of D and P at 2.5 cM. D) The evidence supports linkage of D and P at 0.25 cM. E) The evidence indicates that D and P are not linked.

Biology & Microbiology

There is an antibiotic called streptomycin that doctors prescribe for infection. The antibiotic combines with the bacteria's ribosomes causing them to lose their function. Consequently the cell dies and so the person gets better! In other words, the antibiotic destroys bacteria by

a. stopping photosynthesis b. preventing them from packaging materials c. stopping the production of ATP energy d. not allowing them to produce proteins.

Biology & Microbiology

Which trophic level has the LEAST biological magnification?

A) Primary producers B) Secondary consumers C) Tertiary consumers D) Heterotrophs E) Primary consumers

Biology & Microbiology

Describe the technique of fluorescence resonant energy transfer (FRET) and its purpose

What will be an ideal response?

Biology & Microbiology