Protein transport into the endoplasmic reticulum (er) or mitochondria requires unfolding of the protein and threading the amino acid chain through a channel or pore into the organelle. in contrast, protein transport into the nucleus does not require unfolding of the protein. why is unfolding unnecessary for nuclear protein import?

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

Physical characteristics of down syndrome

Hey everybody, i have another biology question. by what reproductive mechanism does a haplontic animal grow? initially mitosis, then meiosis completely by mitosis completely by meiosis initially by meiosis, then by mitosis