Which of the proposed models for the mechanism of initial transcription suggests that the entire rna polymerase enzyme moves along the dna? which of the proposed models is best supported by experimental findings? a. transient-excursion model; scrunching modelb. inch worming model; scrunching modelc. scrunching model; transient-excursion model. d. inchworming model; transient-excursion model

The right answer is Letter A

Explanation:

The proposed model for the mechanism of initial transcription that suggests the entire RNA polymerase enzyme moves along the DNA is transient-excursion model, and the proposed model that is best supported by experimental findings is scrunching model.

Because RNA polymerase leaves the promoter, translocate a short way along DNA template, synthesizes a short transcript before aborting transcript, releasing the transcript and returning to its original location on promoter. That is the transient-excursion model.

The scrunching model downstream DNA is pulled into the enzyme and has accumulated within the enzyme as single stranded bulges.

Experiments show that scrunching is right, experiments using single molecule analyses that allow the positions of different parts of polymerase to be measured relative to each other and to the template DNA during transcription.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.