Which of the following does NOT follow the base pairing rule?
A. A with T
B. G with C
C. U with D
D. U with A
C. U with D
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Describe amplification of hormone action
What will be an ideal response?
Submerged aquatic plants can take up CO2 from the water in all of the following ways, except
A) diffusion through stomata. B) direct diffusion of ambient CO2 from water across cell membranes. C) active transport of bicarbonate into the leaf followed by conversion to CO2. D) excretion of carbonic anhydrase into the water, followed by uptake of the resulting CO2.
Activation of cytotoxic T cells requires binding to class I MHC molecule complexed with a foreign antigen and the release of ________ from ________.
A) interleukin-1 : helper T cells B) interleukin-2 : helper T cells C) interleukin-10 : macrophages D) interleukin-2 : macrophages E) interleukin-1 : macrophages
Mechanoreceptors include unencapsulated dendritic endings, Merkel disks, Meissner's corpuscles, Pacinian corpuscles, and olfactory receptors
Indicate whether the statement is true or false