Ammonia (NH3) is converted to nitrite (--NO2) by 

A. decomposers.
B. nitrogen-fixing bacteria.
C. nitrifying bacteria.
D. denitrifying bacteria.


C. nitrifying bacteria.

Biology & Microbiology

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What, if anything, distinguishes learning from memory?

A. Learning is the process of acquiring new information while memory is the retention of that information over time. B. Memory is the process of acquiring new information while learning is the retention of that information over time. C. Both learning and memory are the process of acquiring new information. D. Both learning and memory are the retention of information over time. E. Memory does not require prior learning.

Biology & Microbiology

Using fetal DNA from the mother's blood for prenatal testing is a noninvasive procedure

a. True b. False Indicate whether the statement is true or false

Biology & Microbiology

Growth of new blood vessels is stimulated by vascular endothelial growth factor (VEGF). This ligand binds to the VEGF receptor, which leads to the dimerization and autophosphorylation of this receptor on cytoplasmic tyrosines. What type of receptor is the VEGF receptor?

A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor

Biology & Microbiology

As a microbiologist you have been asked to investigate the regulation of a novel gene in a bacterial species. Given what is known about bacteria, the logical place to begin your investigation is

A. alternative splicing regulation. B. regulation by enhancer elements. C. regulation by general transcription factors. D. transcriptional regulation. E. translational regulation.

Biology & Microbiology