The alpha (?) helix is a type of ________ protein structure.
A. primary
B. quaternary
C. tertiary
D. secondary
Answer: D
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When an enzyme becomes denatured, it
(a) increases in effectiveness. (b) loses its requirement for a substrate. (c) forms an enzyme–substrate complex. (d) loses its ability to function.
Using the genetic code, predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele.
Normal allele GGAAUGAAACAGGAACCC Mutant allele GGAAUGAAACAGGUACCC a point mutation, Val to Glu a frame shift addition of a new stop codon a point mutation, Glu to Val
In plants like the fern, haploid cells produced by meiosis divide by ________, forming a multicellular haploid phase.
A. budding B. mitosis C. meiosis D. binary fission
Any cell that generates an electrical signal in response to a stimulus is a ________ receptor
Fill in the blank(s) with correct word