What is the significance of the homeodomain?
What will be an ideal response?
The homeodomain is a highly conserved protein of 60 amino acids found in a variety of organisms, which, in conjunction with other factors, is thought to play a role in DNA binding and transcriptional activation.
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The immediate causes of behaviors, such as genetic and physiological mechanisms are called __________ causes.
A. proximate B. ultimate C. internal D. physiochemical E. internal and physiochemical
What feature of genetic mutations can eventually lead to the evolution of new species?
A. Mutations always produce harmful effects. B. Mutations never affect protein structure or function. C. Mutations are not a mechanism through which biological evolution occurs. D. Mutations always produce beneficial effects. E. Mutations produce changes in the DNA sequence of a gene.
The ribosome binding site is located ____ and is where ____
a. at the start codon; the large ribosome subunit binds the mRNA-tRNA complex in prokaryotes b. just upstream of the start codon; the large ribosome subunit binds the mRNA in eukaryotes c. on initiator tRNA; the large ribosome subunit binds the mRNA-tRNA complex in eukaryotes d. on aminoacyl-tRNA; the large ribosome subunit binds the tRNA in prokaryotes e. just upstream of the start codon; the small ribosome subunit binds the mRNA in prokaryotes
Blood usually continues on from capillaries to
enter ____ in its travel through the human body. a. arterioles b. venules c. arteries d. veins e. other capillaries