Answer:
The correct answer is B. nitrogenous bases
Explanation:
Double-stranded DNA is the genetic material in almost all the living organisms present on the earth. This DNA is present in a helical form. Each DNA strands us made up of nucleotides which are joined together by phosphodiester bond.
DNA is made up of two DNA strands therefore the two DNA strands are also joined and the two strands are joined together by hydrogen bond formation between two complementary nitrogenous bases.
These nitrogenous bases are adenine, guanine, cytosine, and thymine. Adenine and thymine are complementary to each other and guanine and cytosine are complementary to each other. Therefore the right answer is B.
Colonies of cyanobacteria benefit aquatic organisms because they can be an important source of food to organisms.
The problem with cyanobacteria is that they can be harmful and in an alga bloom then can cover the surface cutting off any light to other plants and producing toxins that kill fish and other life forms.
False
fat should be included in a healthy balanced diet
but trans fat should be avoided
The correct answers are: The lipid bilayer and proteins exist side by side without covalent bonds between them and Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane
According to fluid mosaic model, there is a lipid bilayer that gives fluidity and in which the protein molecules are embedded.
The membrane is mosaic because there is a pattern of different types of molecules that are put together. Molecules are constantly moving in two dimensions.
Components of the cell membrane include:
• Phospholipids – Form a bilayer
• Cholesterol –improves stability and reduce fluidity
• Proteins –integral (transmembrane) or peripheral
• Sugars-usually attached to proteins.
I hope this helps you and remember the captain letter always goes first then the lower case