The alpha (?) helix is a type of ________ protein structure.

A. primary
B. quaternary
C. tertiary
D. secondary


Answer: D

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

Any cell that generates an electrical signal in response to a stimulus is a ________ receptor

Fill in the blank(s) with correct word

Biology & Microbiology