Contain anticodons that match the codons sued to specify which amino acid should be added to the growing polypeptide chain during protein synthesis
What will be an ideal response?
tRNA's
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Which of the following occurs in meiosis but not in mitosis?
A) chromosome replication B) synapsis of chromosomes C) production of daughter cells D) alignment of chromosomes at the equator E) condensation of chromosomes
How are humans able to produce billions of unique B and T cell receptors?
a. Each time a pathogen is encountered, a new receptor is produced. b. The two different genes that encode receptor proteins, allow for many versions of receptors to be produced. c. Random splicing of gene segments encoding receptor proteins allows for 2.5 billion potential combinations. d. Antigen presenting cells stimulate B and T cells to each produce billions of receptor molecules. e. There are billions of B and T cells, each of which produces a single receptor on its cell surface.
Biologists generally classify animal behaviors by
A. both the way the organism acquired the behavior and how changeable the behavior is in the organism. B. the way the organism acquired the behavior. C. the number or proportion of the species that displays the behavior. D. how specific or general the behavior allows the organism to interact within its environment. E. how changeable the behavior is in the organism.
What structural part of a bacterial flagellum is composed of flagellin?
a. Rod b. Basal body c. Hook d. Filament