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The Fundamentals of Biological Systems and Cellular Life Quiz

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The Fundamentals of Biological Systems and Cellular Life Quiz

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Questions and Answers

Which enzyme is responsible for catalyzing the formation and breakage of disulfide bonds in proteins?

Protease

Prolyl cis-trans isomerase (PPI)

Ligase

Protein disulfide isomerase (PDI) (correct)

What is the role of prolyl cis-trans isomerase (PPI) in protein folding?

PPI helps in the formation of disulfide bonds

PPI catalyzes the folding of proteins

PPI stabilizes the tertiary structure of proteins

PPI assists in the correct folding of proline residues (correct)

Which techniques can be used to determine protein structure?

PCR and gel electrophoresis

X-ray crystallography, NMR, and cryo-electron microscopy (correct)

Western blotting and immunohistochemistry

Mass spectrometry and chromatography

Which of the following is an advantage of carbon as a basis for living systems?

Carbon can form stable bonds with many other elements. Signup and view all the answers

Why is silicon not a good substitute for carbon in biological systems?

Silicon does not form stable bonds with other elements. Signup and view all the answers

Which of the following is true about prokaryotic and eukaryotic cells?

Eukaryotic cells have a more complex internal structure compared to prokaryotic cells. Signup and view all the answers

Which of the following is true about water as a solvent?

Water forms hydrogen bonds which give it its solvent properties Signup and view all the answers

Why is ammonia not a good substitute for water as a solvent?

Ammonia does not form hydrogen bonds Signup and view all the answers

What is the nature of hydrogen bonds in water?

Hydrogen bonds are weak attractions between water molecules Signup and view all the answers

How do polar and nonpolar molecules interact with water?

Polar molecules attract water, while nonpolar molecules repel water Signup and view all the answers