The following statement describes what level of structure in a protein? Several separate proteins link together to form an active enzyme.
A) primary structure
B) secondary structure
C) tertiary structure
D) quaternary structure
E) none of the above
Question 2
In one type of fuel cell the following oxidation-reduction reactions are taking place:
2 H2 + O2 2 H2O
What is the fuel ?
A) H2
B) O2
C) H2O
D) all of the above
E) none of the above
Question 3
Why do soils that contain a high percentage of clay retain plant nutrients so well?
A) The ions of clay tend to be positively charged while nutrients tend to be negatively charged.
B) Water cannot penetrate through clay very well, which means that nutrients are not readily washed away.
C) Clay contains many magnetic particles, which have the effect of holding onto the nutrients.
D) Because of a lack of water, the nutrients are not dissolved, which means they adhere as a solid to the clay particles.
The structure of the placenta
Basic structure of the autonomic pathway
Upper-Level Maps
Schematic of de novo structure prediction using Rosetta
Structure of the p53–DNA complex
The cystic fibrosis protein is a membrane protein. The CFTR protein is located in the plasma membran