Answer:
When a gel is stained with a DNA-binding dye, the DNA fragments can be seen as bands ... At the molecular level, the gel is a matrix of agarose molecules that are held ... the DNA fragments will glow, allowing us to see the DNA present at different ... By comparing the bands in a sample to the DNA ladder, we can determine ...
Explanation:
The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
Answer: Option C) Determining the link between genes and the traits they influence.
Explanation:
First, the field of molecular biology seeks to understand the relationship between genes and proteins. Now, since genes are specific sequences on the DNA that codes for functional proteins, and these proteins make up the various traits physically expressed in living organisms such as skin color, blood group etc.
Then, the specific research goal of Carlita would be determining how genes control the expression of individual traits at the molecular level
Answer:
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
