Answer:
Explanation:
Which of the four types of macromolecules, and in which proportions, are present in this food sample?
Answer:
The cloned sheep is the result of nuclear fusion from two different sheeps. In one sheep the enucleated egg is fused with DNA of another sheep.
Explanation:
The cloned sheep is the result of nuclear fusion of 2 different sheep. In the cloning process, the egg cell of one sheep was enucleated. Then a DNA from another sheep had taken and put into the enucleated egg cell to fuse. Then the egg allowed to divide in the laboratory to the blastocyst stage. The blastocyst incorporated into a surrogate mother or a third sheep. The surrogate mother after some months gives birth to the cloned sheep.
The sheep produced by normal reproduction has the DNA of two parents. The sheep have two parents and resemble their parents.
In cloned sheep, there is no biological parent and have DNA of the donor sheep. That means the cloned sheep has a gene of a single sheep not the DNA of others. Because the egg cell was enucleated before the cloning process. The sheep are more like the donor DNA sheep not like the surrogate mother.
Plasma membrane is described as Semi permeable because it selects what molecules enter/exit the cell which is important in maintaining homeostasis.
Answer:
When certain large molecules are unable to move through the membrane without the help of channel proteins
Explanation:
Facilitated diffusion occurs when large molecules that are unable to pass through a membrane on their own make use of channel proteins to move from one side of the membrane to the other. Facilitated diffusion can occur when a liquid on one side of a membrane has a higher osmotic pressure than a liquid on the other side of the membrane, but it isn’t a required feature of facilitated diffusion. Similarly, facilitated diffusion can occur when there’s a large membrane potential present, but it isn’t a required feature of facilitated diffusion. Facilitated diffusion doesn’t require the use of energy, so the presence of ATP is irrelevant to facilitated diffusion occurring.
