Stable isotope probing (SIP) is a method that
A) causes cells that hybridize with a fluorescent probe to fluoresce under UV light.
B) compares the isotopic ratios of different compounds in the environment to determine whether they are of biological or geological origin.
C) uses substrates containing heavy isotopes to label the DNA of organisms that use those substrates.
D) compares the transcription of specific isotope labeled genes under different conditions.
Answer: C
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Which of the following are examples of genetic drift?
A. Bottle Neck Effect B. Founder Effect C. Random Mating D. A & B only E. A, B, & C
The process of gas exchange in parabronchi is similar to:
a. the surface of the gill filaments. b. the surface of the pleural membrane. c. the surface of the bronchioles. d. the surface of the alveoli. e. the surface of the gill filaments and the surface of the alveoli.
You are investigating the activity of different cadherins in cells. You use recombinant DNA technology to express GFP-E-cadherin (green) in some L-cells (which do not normally contain cadherin) and YFP-P-cadherin (yellow) in other L-cells
Explain results you expect in three cultures containing: (1) only cells expressing GFP-E-cadherin, (2) only cells expressing YFP-P-cadherin, and (3) a mixture of GFP-E-cadherin-expressing and YFP-P-cadherin-expressing cells. Also predict how (a) knocking down the ability of the cells to synthesize fibronectin (FN) or (b) adding EGTA, which depletes free Ca2+ concentration in the culture medium, might affect the results. What will be an ideal response?
These antigens are responsible for the rejection of transplanted tissues or organs from donors that are "incompatible."
A. human leukocyte antigens B. histocompatibility antigens C. HLA D. All of the choices are true.