Lon-Capa Assignment #9

How many types of RNAP are found in eukaryotes?

3

As discussed in lecture, it is possible to determine protein structure from X-ray crystallography without any knowledge of that protein's sequence.

False

The Barr Body is the actively transcribed X chromosome in females.

False; Bar body means inactivation of one the two X-chromosome

As discussed in lecture, all Calico cats are male because the gene that specifies the calico color pattern is on the Y chromosome.

False

Based on our discussion in lecture, how many active X-chromosomes would there be in each cell of a female that had four copies of the X-chromosome per cell?

1

As discussed in lecture, X-chromosome inactivation is a common cause of colorblindness in human males.

False; if it was lack in teeth, hair or sweat glands it would be true.

As discussed in lecture, enhancers are typically comprised of densely packed consensus elements.

True

As discussed in lecture, the de novo formation of heterochromatin involves a "spreading" mechanism.

True

As discussed in lecture, for both position effect variegation and x-chromosome inactivation, once the inactive state of heterochromatin is formed, it is heritable through mitosis.

True

How many barr bodies are present in a human XY cell?

0; Bar bodies are only in females (XX)

How many barr bodies are present in a human XX cell?

1