Which type of cell-surface receptor undergoes changes in phosphorylation in response to binding of its ligand?
A. G protein-coupled receptor
B. receptor kinase
C. ligand-gated ion channel
D. both the G protein-coupled receptor and
the receptor kinase
B
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You are studying genes in yeast and find that the genes can be placed into four groups that tend to be inherited together. From this you can conclude that yeast
A. have four chromosomes. B. have four loci. C. have four alleles. D. have four genes. E. produce four cells during meiosis.
Which of the following was unknown to
Mendel?
a. complementary base pairing b. chromosomes c. meiosis d. the structure of DNA e. none of these were known to Mendel
Which of the following regarding the haversian system is false?
A. Haversian canals may contain nerve fibers. B. Haversian canals run parallel to the length of long bone. C. It keeps osteocytes alive. D. Haversian canals are created by osteoclasts that tunnel through the bone matrix.
What is the target tissue for ADH?
a. kidney b. adrenal gland c. ovaries d. testes e. breast tissue