Single-stranded miRNA targets the RISC complex to specific mRNA targets that contain sequences complementary to the miRNA
A. true
B. false
A
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Restriction enzymes
a. work at recognition sites. b. function only at "sticky ends." c. produce uniform lengths of DNA. d. function in viruses. e. are produced by viruses to break down bacterial DNA
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
In the embryonic development of flowering plants, the basal cell develops into the:a
apical cell. b. apical meristem. c. suspensor. d. integuments. e. endosperm
In most cells chromosomes are __________ in pairs based on their size and shape.
Fill in the blank(s) with the appropriate word(s).