Why do scientists use model organisms?
What will be an ideal response?
Model organisms have rapid development, short life cycles, and small adult sizes, making them ideal
to work with in the laboratory setting.
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____ behaviors are instinctive and carried out regardless of earlier experience
Fill in the blank with the appropriate word.
Why is it advantageous for transcription factors to be multimeric and for their binding sites to be clustered?
A) The strength of the DNA-protein interactions is increased. B) The DNA sequence specificity of each DNA-protein interaction is increased. C) Each DNA-protein complex is better able to bind to RNA polymerase. D) Competition for binding between different transcription factors for the same regulatory region is decreased.
The envelope of the HIV virus is actually part of the host cell plasma membrane.
Answer the following statement true (T) or false (F)
Which of the following are consequences of anaerobic respiration? (Check all that apply.)
A. Some bacteria are able to perform nitrogen fixation. B. Some bacteria are able to readily survive in both well-oxygenated as well as anoxic environments. C. Bacteria are able to reduce the levels of NO3? in sewage plant effluents. D. Some bacteria may cause denitrification.