What does a growth factor/ligand bind to activate a cell signal?
a. cytoplasmic tail
b. cell surface receptor
c. phosphate group
d. growth factor
Ans: b. cell surface receptor
Biology & Microbiology
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Steroid hormones are derived from:
A. cholesterol. B. amino acids. C. proteins. D. nucleotide bases. E. phospholipids.
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What is the role of RAG1 and RAG2 in immunoglobin rearrangement?
What will be an ideal response?
Biology & Microbiology
Blood flows from the efferent arterioles directly into the peritubular capillaries. Indicate whether the statement is true or false
Biology & Microbiology
Chordates are characterized by having a ________, a dorsal, flexible supportive rod.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology