cell differenciation

5. how are cells differentiated in organisms?

• each cell contains the same DNA but gene expression is different

• each type of cell in an organ contains unique DNA for that organ type

• genes for specialized cells are instructed by amino acids to differentiate

• organisms are born with specialized cells which develop into specific organs

7. how are the instructions for the traits of any organism coded?

• by the sequence of nucleotides

• by the sequence of fat molecules

• by the sequence of starch molecules

• by the sequence of glucose monomers

11. which best describes how stem cells differentiate into various tissues?

• as stem cells develop, some genes are turned off permanently

• other cells can be implanted without genetic information

• other cells develop their genetic makeup as they grow

• stem cells are the only cells with sex chromosomes

16. what determines cell differentiation once gene regulation has taken place?

• fluids

• proteins

• mitochondria

• adenosine triphosphates

24. what cells can differentiate into specialized cells when grown in the right laboratory culture conditions?

• only adult stem cells

• only embryonic stem cells

• only bone marrow stem cells

• both embryonic and adult stem cells

26. what occurs during cell differentiation?

• all DNA is inactivated.

• stem cells are replicated.

• specific parts of DNA are activated.

• nerve cells are transformed into stem cells.

31. which of these determines whether a fertilized egg develops into a toad, a snake, or a lizard?

• the sex of the egg

• the age of the egg

• the size of the egg

• the genes of the egg

37. a scientist wants to turn a group of specialized cells into stem cells. Which type of cell should she choose?

• egg cells

• sperm cells

• epithelial cells

• red blood cells

48. which cell is undifferentiated?

• stem cell

• sperm cell

• kidney cell

• red blood cell

53. which organism would require cell differentiation?

• amoeba

• bacteria

• cactus

• euglena