1. Which of the following statements is true? Mitochondria likely originated from an aerobic bacterium engulfed by a pre eukaryotic cell, the signal sequence that directs proteins into mitochondria matrix is a hydrophilic helix; proteins import into mitochondria cross the membrane in folded state; no energy is required for proteins import into mitochondria 2. Which of the following statements about vesicular transport is true? Clathrin is the only coat proteins used in vesicle formation; motor proteins are not needed for vesicular transport; the orientation of transmembrane proteins is not preserved during vesicular transport; cargo proteins do not cross membrane during vesicular transport 3. Which of the following statements regarding the nucleus is true? The nucleus is surrounded by a single layer of membrane, the nuclear envelope is not connected with the ER membrane, proteins of any size can freely diffuse through the nuclear pore complexes
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.
1. Which of the following statements is true? Mitochondria likely originated from an aerobic bacterium engulfed by a pre eukaryotic cell, the signal sequence that directs proteins into mitochondria matrix is a hydrophilic helix; proteins import into mitochondria cross the membrane in folded state; no energy is required for proteins import into mitochondria
2. Which of the following statements about vesicular transport is true? Clathrin is the only coat proteins used in vesicle formation; motor proteins are not needed for vesicular transport; the orientation of transmembrane proteins is not preserved during vesicular transport; cargo proteins do not cross membrane during vesicular transport
3. Which of the following statements regarding the nucleus is true? The nucleus is surrounded by a single layer of membrane, the nuclear envelope is not connected with the ER membrane, proteins of any size can freely diffuse through the nuclear pore complexes
Introduction :-
Clathrin is a protein that plays a major role in shaping and forming vesicles in eukaryotic cells. It is a three-legged protein that forms a lattice-like structure called a triskelion. Clathrin is involved in clathrin-mediated endocytosis, a process by which cells internalize extracellular materials
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