Which one of the following explanations does not describe why generating transgenic animals is more difficult than plants?
A) The intracellular environment of an animal can be much different than bacteria and even plants.
B) Animal cells do not readily take up plasmid DNA like plant cells.
C) The techniques for cloning animals from a single cell are more challenging than for plants.
D) Genetic material must be inserted into a fertilized egg, then implanted into a living animal; plants can be grown in culture media, and thus, there is no need for implantation.
E) Genetic material is introduced to animal cells in culture media and the animal is allowed to mature in the culture media.
E
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In complementary base pairing of DNA, adenine pairs with ________ (or ________ in RNA) and cytosine always pairs with ________
A) guanine / uracil / thymine B) uracil / thymine / guanine C) thymine / guanine / uracil D) thymine / uracil / guanine
The portion of an enzyme where the substrate binds is known as the ____
a. receptor site b. active site c. target receptor d. target site e. contact site
Of the two cell lines that can contain a mutation in an organism, somatic line and germ line, the latter is more consequential to subsequent generations
Indicate whether the statement is true or false
If you were to buy land in order to plant crops, which type of biome would you prefer?
A) savanna B) prairie C) tropical forest D) chaparral