QUESTION 31 Which molecule is displaced when a vesicle and its target membrane fuse? OA. Water OB. Phospholipids OC. SNARES OD. DNA O E. Cholesterol QUESTION 32 Which of the following is a possible explanation as to why a transcription factor that you expressed in the cytoplasm using a plasmid stayed in the cytoplasm and did not move into the nucleus? OA. The transcription factor is lacking a nuclear localization signal. OB. The protein lacks a proteasome-targeting sequence. OC. The transcription factor is lacking a signal sequence to direct it to the ER. OD. The transcription factor is lacking a KDEL retention signal. QUESTION 33 A newly formed COPII-coated vesicle has all of the following except OA. Sar 1 OB. Clathrin OC.Sec 13/31 OD. Sec 23/24 OE. V-SNARE

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Proteins

We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.  

Protein Expression

The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.