Mouse embryonic stem (ES) cells ______________________
(a) can only be produced through therapeutic cloning.
(b) can give rise to all tissues and cell types in the body except germ cells.
(c) can be implanted in foster mothers to produce cloned cows and other animals.
(d) come from the inner cell mass of early embryos.
(d) Mouse ES cells are cells that are dissociated from the inner cell mass of early embryos. These cells can either be produced naturally in embryos or be produced by therapeutic cloning [choice (a)]. ES cells can give rise to all tissues and cell types of the body, including germ cells [choice (b)]. An organism's genes determine what an embryo grows up to become, and thus mouse ES cells can be used only to generate mice, even when implanted into foster mothers [choice (c)].
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A deletion in an operon removes the promoter. How will that affect the transcript that is produced from the operon?
A. The transcript will be produced and normal in length B. The transcript will be produced, but shorter than normal C. The transcript will be produced, but longer than normal D. The transcript will produced, but will contain a deletion E. The transcript will not be produced
Archaea, Bacteria, and Eukarya are:
A. phyla B. kingdoms C. families D. domains E. orders
Spirilli are Gram-negative bacteria that possess internal flagella, which cause the entire cell to twist in a corkscrew
pattern.
Indicate whether the statement is true or false.Capsular
What will be an ideal response?