Nonpolar and small polar moleculescan pass through the cell membrane, so they diffuse across it in response to concentration gradients. Carbon dioxide and oxygen are two molecules that undergo this simple diffusionthrough the membrane. The simple diffusion of water is known as osmosis.
This arrangement means that only small, uncharged molecules can pass through the membrane. The membrane is called semipermeable, meaning that some things can pass through without assistance, while other things cannot. Water is a charged molecule, so it cannot get through the lipid part of the bilayer. In order to allow water to move in and out, cells have special proteins that act as a doorway. These proteins are called aquaporins (aqua = water, porin = pore).
hope this helps
Answer:
1) A double Helix with complementary bases in the middle. The backbone is made of sugar and phosphates. The middle is bases
2) To hold the genetic info for the cell
3) To bring the genetic info from the nucleus to the ribosomes as DNA can't leave the nucleus
4) To bring amino acids to the ribosomes to help build a protein
5) A chain of amino acids held together by peptide bonds
6) Ribosomes
7) Because those are the bases that are complementary in DNA so they must be equal
8) It could lead to a mutation as it would cause the mRNA to code for a different amino acid and thus a different protein will be made
9) DNA is the blueprint for mRNA which will travel to the ribosomes and code for specific amino acids which will eventually build a protein
A point mutation can either be silent, missense, or nonsense. In silent mutations, the codon is changed but the encoded amino acid is not changed. This is because different codons code for the same amino acids. Missense mutations will have a significant effect on the protein because the amino acid is replaced by another. A nonsense mutation will result to a fragmented protein because the mutation will lead to the formation of a stop codon which will stop the translation process.
To clearly view the morphology of the prokaryotes, one needs a microscope with higher resolution i.e magnification of ×100. Use of oil for this purpose is important because it reduces the refraction of light as it travels from air to glass. this process increases the resolution of the microscope making it possible to view morphology of bacteria.
Answer:
Burried in protein
Explanation:
Leucine have a branched hydrocarbon side chain. The side chain of leucine is nonpolar and hydrophobic.
If a protein have to face water, proteins fold in such a way during the tertiary structure that the amino acid with polar characteristics tend to remain on outer surface while amino acid with nonpolar characteristics tend to remain in the core of protein.
So Leucine side chain would be found burried in core of protein.