When bound to ligand, this type of receptor changes conformation to allow ions to move down their concentration gradient across the membrane:
A. Enzymatic receptor
B. Channel-linked receptor
C. G protein-coupled receptor
D. Steroid hormone receptor
Answer: B
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Many advances in modern genetics were achieved by the use of which of the following molds?
a. Saccharomyces cerevisiae b. Agaricus bisporus c. Neuospora crassa d. Candida albicans
Each of the following is a way cancer cells avoid growth and invasion restriction imposed by the immune system except
A) They produce a heterogeneous group of cells. B) They respond to density-dependent growth factors. C) They produce molecules that inhibit T lymphocyte function. D) They surround themselves with dense supporting tissue. E) They express low levels of surface antigens.
The fluorescent tag likely became incorporated into which of the following organelles during the video?
A) mitochondria B) ribosomes C) endoplasmic reticulum D) peroxisomes
Ammonium ion (NH4+) is oxidized to nitrate (NO3-) in a process known as
A. assimilation. B. anammox. C. nitrogen fixation. D. nitrification. E. denitrification.