The oxygen in air is lethal to:
a. Obligate anaerobes
b. Aerobic microorganisms
c. Microaerophilic microorganisms
d. Obligate thermophiles
e. Facultative anaerobes
Answer: a. Obligate anaerobes
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Why are genes associated with nitrogen fixation not typically used to identify bacteria species? (Select all correct choices.)
A. Their sequences are similar to those of rRNA genes. B. These genes are not typically exchanged between bacteria by horizontal gene transfer. C. These genes are often exchanged between bacteria by horizontal gene transfer. D. Every bacterium contains nitrogen fixation genes.
Where is the primary meristem located?
A. Dermal tissue. B. Vascular tissue. C. Woody stem. D. Root and stem tips. E. Stem tip only.
The process by which an RNA strand is synthesized from a DNA template strand is called ___________ .
Fill in the blank (s) with the appropriate word(s).
If a cell reverses the process of beta-oxidation, which of the following molecules will it make?
A. glycerol B. amino acids C. fatty acids D. nucleotides E. starch