Search & Filtering
Briefly outline a cell signalling mechanism. Use a named signalling molecule along with its receptor type in order to illustrate your answer.
Explain in details the advantages and disadvantages of zebrafish as an animal model.
DNA is the genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes. Which statement accurately describe the variables in this study?
A.
There are three histologic specimens of cartilaginous tissue. Two of them are stained with
hematoxylin-eosin, and one histologic specimen is stained with orcein. What fibres and in what
type of cartilaginous tissue can be determined by such dyes? What functional properties of the
cartilaginous tissue do they cause?
There are three histologic specimens of cartilaginous tissue. Two of them are stained with hematoxylin-eosin, and one histologic specimen is stained with orcein. What fibres and in what type of cartilaginous tissue can be determined by such dyes? What functional properties of the cartilaginous tissue do they cause?
There are three histologic specimens of cartilaginous tissue. Two of them are stained with
hematoxylin-eosin, and one histologic specimen is stained with orcein. What fibres and in what
type of cartilaginous tissue can be determined by such dyes? What functional properties of the
cartilaginous tissue do they cause?
There are three histologic specimens of cartilaginous tissue. Two of them are stained with
hematoxylin-eosin, and one histologic specimen is stained with orcein. What fibres and in what
type of cartilaginous tissue can be determined by such dyes? What functional properties of the
cartilaginous tissue do they cause?
The cells of an ant and a horse are roughly the same size; a horse is bigger simply because it has more. What is the main benefit for cells to be very small?Explain how ATP was produced in penthose phosphate pathway.
1. As an environmental engineer, you will follow the scientific method and start your work by generating a hypothesis first.
Formulate a hypothesis on how bacterial cells use their characteristics to take up hydrocarbons from oil spills. Specify the mode of transport through the cell membrane (active vs. passive/endocytosis vs. exocytosis) and support your claim with scientific reasoning.
Describe how these bacterial cells would take up hydrocarbons if:
- they only possessed a cell membrane and lacked the cell wall.
- they possessed membrane-bound organelles such as vesicles.
Include in your answer the lipid bilayer, structural components of cell membranes and those of cell walls and discuss the selective permeability characteristic of membranes.
