Water has an important stabilizing effect on temperature in living organisms and their environments because as water absorbs heat, much of the energy is used to ____ instead of raising the temperature
a. create hydrogen bonds
b. create covalent bonds
c. break surface tension
d. break hydrogen bonds
e. create hydration layers
ANSWER: d
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Which of the following is not true of the transcription-activation domains of transcriptional activators?
A. Many are composed of acidic, proline-rich, or glutamine-rich regions. B. They are thought to be relatively unstructured. C. These domains are likely to interact with DNA. D. These domains interact with other proteins.
Identify the appropriate DNA homolog, or complementary sequence, that could be used as a probe for in situ hybridization to the following target RNA: 5'-AUGCGAUUC-3'
a. 5'-TACGCTAAG-3' b. 5'-ATGCGATTC-3' c. 5'-GAATCGCAT-3' d. 5'-AUGCGAUUC-3'
Which situation describes potential observer bias in an experimental process?
A) Dr. Jones is evaluating cancer patients for their responses to a new therapeutic drug. She knows which patients are receiving the placebo and which are receiving the drug. B) Mr. Bromley is conducting a survey of weight loss for his professor. He asks each student in the study the same questions. C) Ms. Bradley is an outside consultant who is conducting a health and wellness survey for a pharmaceutical company. She does not know the name of the company nor does she know the name of the drug being tested during the survey. D) Dr. Postgate is analyzing biopsy samples from rats that have been given either a placebo or an experimental drug believed to reduce inflammation. Each sample is identified by a code number so that Dr. Postgate cannot tell which treatment the rats received.
Is cellular respiration an endergonic or an exergonic reaction?