What distinguishes an embryonic stem cell from a somatic cell of an adult organism?
A) Embryonic stem cells cannot be reprogrammed, but somatic cells can be reprogrammed.
B) Embryonic stem cells can produce more of themselves as well as produce specialized cells, but somatic cells are already specialized.
C) Somatic cells can produce more of themselves and produce stem cells.
D) Somatic cells can change into specialized cells, while stem cells can only produce more of themselves.
Answer: B
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Mucus production that blocks ducts of certain glands and lung passages is a symptom of ____________________. What will be an ideal response?
Which one of the following is correct regarding the structure of an antibody?
A) An antibody is made up of two polypeptide chains linked by hydrogen bonds. B) The four polypeptide chains that make up an antibody molecule are linked by disulfide bonds. C) The constant regions of the polypeptides in an antibody form antigen-binding sites. D) Only one polypeptide in an antibody has a constant region and a variable region. E) The polypeptides making up an antibody are connected by hydrogen bonds.
When a sodium atom and a chlorine atom interact to complete their valence shells
A. they form 1 polar covalent bond B,. an electron is transferred from sodium to chlorine, turning the sodium atom into an anion and the chlorine atom into a cation and allowing the two atoms to form an ionic bond C. an electron is transferred from sodium to chlorine, turning the sodium atom into a cation and the chlorine atom into an anion and allowing the two atoms to form an ionic bond D. they form 2 polar covalent bonds
The smooth endoplasmic reticulum is the site of (protein/lipid/carbohydrate) synthesis
What will be an ideal response?