Answer:
A. 
Explanation:
cool . . this that correct. 
 
        
             
        
        
        
Answer:
Answer is B. Escherichia Coli.
Explanation:
Transformation involves the introduction of foreign DNA into competent organism, I.e E.coli.
This effect can be done through the application of electric current across the cell. This process is known as electroporation.
 
        
             
        
        
        
Answer:
Option D, A subject is observed both before and after two exposures to the treatment.
Explanation:
In A-B-A-B design the alphabets have following meaning
a)	First A – It is the baseline value or the value measured before treatment
b)	First B – It is the treatment measurement
c)	Second A  - It is the withdrawal of treatment  
d)	Second B – It is the reintroduction of treatment  
The second A is known as the reversal phase in which the intervention is withdrawn to see if the target behavior returns to the baseline behaviour
Thus , there are two measurements involved one before the intervention and second after the intervention
Option D is correct
 
        
             
        
        
        
Answer:
3212
Explanation:
Transport vesicles are vesicles that function to carry molecules from one cellular compartment to another. The coat protein complexes I and II (COPI and COPII) are conserved pathways that transport proteins from the endoplasmic reticulum to the Golgi apparatus. Moreover, clathrin is a protein implicated in the formation of coated vesicles. The ADP-ribosylation factor GTPase activating (Arf GAP) proteins play a major role in Arf signaling pathways, which are responsible for uncoating of the COPI coat. On the other hand, COPII vesicles are known to retain their coats until they are recognized by tethering complexes, and whose formation is regulated by the GDP-GTP cycle of the small GTPase Sar1. Finally, the 70-kDa heat shock proteins (HSP70) are chaperones which function as uncoating ATPases to remove clathrin from coated vesicles after endocytosis.