Recognition of a chemical signal by a receptor protein in a membrane is most similar to ____
a. mRNA specifying the sequence of amino acids in a specific metabolic pathway operating
in an organelle
b. binding of a specific substrate to the active site of an enzyme
c. turning on transcription of a gene
d. allosteric regulation of proteins
e. an enzyme requiring a specific optimum pH and temperature for activity
B
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In plants, the haploid generation is called the ______ and the diploid generation is called the __________
A. sporophyte ; spermatogenesis B. gametophyte ; sporophyte C. sporophyte ; gametophyte D. oogenesis ; gametophyte
Fossils are predominantly found in ____
a. metamorphic rocks b. igneous rocks c. sedimentary rocks d. crystalline rocks e. radioactive rocks
What factor increased the Mayan's vulnerability to drought over time?
What will be an ideal response?
If you tear your Achilles tendon you are damaging ECM-rich ________ tissue.
A. epithelial B. muscle C. nervous D. connective