Cell Signal and Cell Cycle

Hey everyone, please help a poor struggling student out could you help me with an explanation with why the answers are correct. Thank you so much

Q. Which is true of transcription factors?
A. They control which genes are turned on to form mRNA

Q. Chemical signal pathways...
A. Often involve the binding of signal molecules to a protein on the surface of a target  cell

Q. In general, a signal transmitted via phosphorylation of a series of proteins
A. brings a conformation change to each protein

Q. Which of the following is NOT true of cell communication systems?
A. Most signal receptors are bound to the outer membrane of the nuclear envelope

Q. Starting with a fertilized egg (zygote), a series of 5 cell divisions would produce an early embryo with how many cells?
A. 32

Q. Which of the following statements is NOT true?
A. The mitotic spindles in prokaryotic cells are composed of microtubules.

Q. How do daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G1 of the cell cycle?
A. The daughter cells have the same number of chromosomes and DNA

THANK YOU there is a pt 2 also hehe