Answer:
water is the universals solvent and the compound that wouldnt disolve is oli because water and oil don't mix
Explanation:
The lipid bilayer of biological membranes<span>, is intrinsically impermeable to </span>ions<span> and polar molecules. Permeability is conferred by two classes of membrane </span>proteins<span>, pumps and channels.</span>
Answer:
The correct answer is - Histones are positively charged.
Explanation:
Histone is an octamer that is made up of four proteins and each protein has 2 copies. These proteins are H2A, H2B, H3, and H4. Histone proteins are mainly made up of positively charged amino acids like arginine and lysine which gives histone proteins an overall positive charge.
This positive charge of histone plays important role in the binding of DNA around it because phosphate group present in the DNA makes DNA negatively charged molecules that are attracted by positively charged histone protein by electrostatic interaction.
This interaction results in the wrapping of DNA around the histone proteins and then compaction of DNA into chromatin. Therefore the right answer is- histones are positively charged.
Answer:
DNA replication does not occur prior to the second cell division during meiosis.
Explanation:
The mitosis and meiosis are the types of cell division which differ in the production of a number of daughter cell that is mitosis produces two daughter cells and the meiosis results in four daughter cells.
The mitosis results in the two diploid cells as DNA replication doubles the amount of DNA which got equally distributed in the cells.
During meiosis which proceeds in two phases: meiosis I and II, the DNA replication take place before meiosis which doubles the amount of DNA and the double amount in two daughter cells but no replication takes place before meiosis II, therefore, the amount is distributed from the divided genes.
Thus, the selected option is the correct answer.