Which type of media is designed to support the growth of a wide range of microorganisms?
a. Selective
b. Nutritive
c. Differential
d. Definitive
B
Many different types of media exist and serve many different purposes in clinical microbiology. Some types are basically nutritive and support the growth of many different types of microor-ganisms.
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How do we know green light is not absorbed by chlorophyll?
A. Green light has such a small wavelength that most of it goes straight through the leaves without interacting with the chlorophyll. B. Not enough of the green light penetrates the ozone layer and makes it to the plant. C. Green light is the wavelength of light that is reflected instead of absorbed by the chloroplasts. D. Green light does not have enough energy to excite an electron in the photosystem.
Briefly describe the life cycle of an earthworm.
What will be an ideal response?
Which of the following statements about methyl-directed mismatch repair systems is FALSE?
A. Methyl-directed mismatch repair systems require the concerted actions of several proteins. B. Methyl-directed mismatch repair systems require exonucleases. C. Methyl-directed mismatch repair systems are most often used to correct pyrimidine dimers. D. Methyl-directed mismatch repair systems exist in all species. E. Methyl-directed mismatch repair systems require incorrectly matched base pairs in the DNA.
Consider the contribution of NADH and FADH2. How many of the 38 total ATP molecules produced in cellular respiration come from the citric acid cycle?
a. 20 b. 22 c. 28 d. 32