What do G-protein coupled, enzyme-linked, and ligand-gated ion channel receptors have in common?
A. They are all linked to protein kinase activation.
B. They associate with protein bound to guanidine phosphates.
C. They open ion channels.
D. They bind similar hormones.
E. They change their conformation when bound to a hormone.
E. They change their conformation when bound to a hormone.
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List the four essential components of cell communication and provide their functions
What will be an ideal response?
Proteins that span both layers of the nuclear envelope function as
a. receptors. b. transporters. c. pores. d. both receptors and pores. e. receptors, transporters, and pores.
In a dihybrid cross involving two autosomal traits on different chromosomes in which the parentals are purebred for the opposite forms of both traits, how many of the offspring would be expected to be homozygous recessive for both traits?
A) 1 out of 16 B) 3 out of 16 C) 6 out of 16 D) 9 out of 16
How can poverty lead to overnutrition and obesity in America?
A. People living in poverty cannot afford foods with complete proteins. B. People living in poverty cannot afford foods with adequate amounts of vitamin A. C. People living in poverty may receive fewer than the minimum dietary requirement. D. People living in poverty take advantage of the growing availability of calorie-rich, highly processed foods. E. All of the above are correct.