In eukaryotic cells, the cell cycle is divided into two main phases in which the cell spends most of its time and metabolic energy. These two phases are
A. interphase and mitosis.
B. mitosis and meiosis.
C. interphase and cytokinesis.
D. interphase and binary fission.
E. mitosis and cytokinesis.
A. interphase and mitosis.
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A cell in G0 state ____
a. is actively growing before cell division begins b. has a cleavage furrow and the cytoplasm is beginning to divide c. is actively replicating chromosomes d. is in cytokinesis e. has entered a resting stage and is not actively dividing
When bound to ligand, this type of receptor changes conformation to allow ions to move down their concentration gradient across the membrane:
A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor
As recently as the 1980s, the medical establishment believed ulcers to be caused by stress and an increase in gastric acidity. How has the current understanding of ulcer development changed patient treatment?
A. There is no treatment for ulcers, then or now. B. Antibiotics are now used to treat ulcers. C. Different foods are now suggested for patients having ulcers. D. Doctors now give their patients sedatives to calm patients with ulcers.
A man who is a silent carrier of the FMO3 "fish odor syndrome" has children by a woman who is "normal." Which of the following would best explain how a child born from these parents could have fish odor syndrome?
a) The child inherits two copies of defective FMO3 alleles from its father. b) The mother is also a silent carrier of the defective FMO3 allele. c) FMO3 is x-linked. d) The child has a mutation in one of its cells, making the FMO3 genes defective in those cells. e) The child inherits two copies of defective FMO3 alleles from its mother.