Nucleosomes are formed when DNA wraps _____ times around the histone octamer in a ______ coil

(a) 2.0, right-handed
(b) 2.5, left-handed
(c) 1.7, left-handed
(d) 1.3, right-handed


(c)

Biology & Microbiology

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The process of post-transcriptional gene silencing triggered by micro-RNA molecules that stop translation is called ____

a. RNA interference b. micro-interference c. translational interference d. transcriptional disruption e. disruptive genetic silencing

Biology & Microbiology

Which of the following statements concerning leucine zipper proteins is FALSE?

a. They are transcription factors. b. They contain loops held together by zinc ions. c. They form homodimers. d. They form heterodimers. e. They contain DNA-binding domains.

Biology & Microbiology

What is different from one DNA nucleotide to the next?

A) The sugar molecule B) The phosphate group C) The base D) The protein

Biology & Microbiology

The signal molecule produced in quorum sensing is

a. A counterstain. b. An inducer. c. Light. d. A simple stain. e. An endospore.

Biology & Microbiology