How does gene expression influence the behavior of cells that contain the same genome (genetic information)?  In other words, why do cells that belong to the same multicellular organism have a different structure and function?

Regarding the following statement: “Human females are a mosaic of cell types” (2-3 sentences maximum per answer) A) What is the basis for this cellular mosaicism?  B)  Why has this female-specific mosaicism evolved? ? C) What is the molecular (molecular = proteins, nucleic acids, other small molecules) basis of this mosaicism ?

Which of the following are the level of biological structure at which stem cells play a part?     macromolecular level     cellular/ organelle levels     tissue/ organ level     organismal level     all of the above     none of the above ** select more than one if necessary, then for part 2, choose which of the following are NOT a level of biological structure?

What does this figure represent? How do you know if this process is occurring in an animal cell or a plant cell?

Which of the following changes to the microtubule binding protein, Tau, commonly occurs in Alzheimerâ s and other neurodegenerative diseases?   A Tau is hypo-phosphorylated and does not bind to microtubules to destabilize them.   B Tau levels are so low in the cell that they only bind to some microtubules.   C Tau is hyper-phosphorylated and does not bind to microtubules to stabilize them.   D Microtubules are hyper-phosphorylated and do not bind to Tau.

What statement about Cdks/Cyclins below is false? A) Cyclins phosphorylate Cdks B) Cdks are kinases C) Cdk expression is constant during the cell cycle D) Cyclin expression fluctuates during the cell cycle E) Cdk activity fluctuates during the cell cycle

Fill in the blank sentences below: ________  is a protein-lined channel in the nuclear envelope that regulates the transportation of molecules between the nucleus and the cytoplasm;  inside the nucleus , ________________ process happens which involve  making an RNA copy of a gene sequence known as   ____ molecule, that leaves the cell nucleus through the ______ and enters the cytoplasm where it binds to a ________ that serves as a template for ______ that directs the synthesis of the protein, which it encodes;  ribosomes are of two kinds, one is floating in the cytoplasm which is the  ______ribosome while the other is attach to ER known as ___ ribosome; proteins in the cell can be packaged, modify and distribute by the __________ and can be delivered to an organelle that produce ATP which is the _____.

If you want to engineer a cytoplasmic protein to become a peroxisomal protein, which of the following amino acid sequences would you need to add?    A signal sequence to its N-terminus and a KDEL sequence to its C-terminus   An SKL sequence to its C-terminus A signal sequence to its C-terminus and a KDEL sequence to its N-terminus  A signal sequence to its N-terminus and an SKL sequence to its C-terminus  A KDEL sequence to its C-terminus