Following statements are related to slow block to polyspermy in mammals.

A. A First slow block to polyspermy comes When the cortical granules fuse with the egg cell membrane, they release protein-digesting enzymes which is called as ovastacin that modify the zona pellucida proteins.

B. A second slow block to polyspermy comes from the so-called zinc spark, the release of billions of zinc ions that is induced by the entry of the first sperm, these released zinc ions are seen to bind to the egg cell membrane form a “zinc shield” that prevents further sperm entry.

C. A third slow block to polyspermy occurs at the level of the egg cell membrane and involves Juno.

Which of the following is incorrect?

#Question id: 4092

#Unit 3. Fundamental Processes

An experimental setup provided the assay for identifying factors that facilitate transcription in the presence of chromatin. A factor called FACT (facilitates chromatin transcription) functions as

#Question id: 4050

#Unit 3. Fundamental Processes

An antibody was produced and used in an immunohistochemical assay to detect the location of RNA polymerase II in a thin section of a liver biopsy. The section was stained with the antibody that had been labeled with a fluorescent tag, and then viewed under a fluorescent microscope. State where you would expect to find positive staining if the enzyme is present.

#Question id: 2059

#Unit 2. Cellular Organization

For a protein to be an integral membrane protein, it would have to be:

#Question id: 5814

#Unit 8. Inheritance Biology

A bacterial cell experiences a mutation as a result of exposure to nitrogen mustard and then divides several times to produce a total of eight cells. How many of the resulting cells would you expect to contain the mutation?

#Question id: 32377

#Unit 2. Cellular Organization