Question

Choose the best answer for each, answers can be used once, more than once or not at all. Helps polymerase in Prokaryotes bind more strongly [Choose) Digests unneeded protein [Choose ] Causes DNA bending so that polymerase binds strongly [Choose] Complimentary binds to mRNA and stops translation [Choose They hold RNA for use or degradation [Choose Often form heterodimers [Choose Binds to activator so can not bind to promoter [Choose]

Answer 1

1. Helps polymerase in Prokaryotes bind more strongly - Operators, it directs the polymerase to bind strongly with the transcriptional binding factors like sigma factors to initialize transcription.
2. Complimentary binds to mRNA and stops translation - Attenuators, these are regulatory regions of 5'-cis that binds to mRNA and stops translation.
3. Digests unneeded protein - Ubiquitization, it is a endogenous protein which mainly helps in protein digestion mechanism.It is a post-translational modification.
4. Causes DNA bending so that polymerases binds strongly - Quenching, it helps to form a loop or DNA bending which is the result of histone deacetylation.
5. They hold mRNA for use or degradation - P bodies, these are cytoplasmic ribonucleoprotein granules which is involved in mRNA decay pathway in eukaryotes.
6. Often forms heterodimers - Leucine zippers, these are made by dimerization of two alpha helix monomers which is bound to DNA.
7. Binds to activator so can not bind to promoter - Enhancers, it binds to activators which in turn activates the gene that is to be expressed. Enhancers cannot bind to promoter.