1.Globular proteins fold up in compact, spherical structures that have uneven surfaces. They tend to form multi-subunit complexes, which also have a rounded shape. Fibrous proteins, on the other hand, span relative large distances within the cell and in the extracellular space. Which of the proteins below are fibrous proteins? a. collagen, keratin b. tubulin and actin monomers c. elastase, pepsin d. hemoglobin and myoglobin
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.Globular proteins fold up in compact, spherical structures that have uneven surfaces. They tend to form multi-subunit complexes, which also have a rounded shape. Fibrous proteins, on the other hand, span relative large distances within the cell and in the extracellular space. Which of the proteins below are fibrous proteins?
a. collagen, keratin
b. tubulin and actin monomers
c. elastase, pepsin
d. hemoglobin and myoglobin
2. Which of the following statements is correct regarding oxidoreductase enzymes?
a. NADH + H+/NAD+ are involved in catabolism and NADPH + H+/NADP+ participate in anabolism.
b. The oxidation of the reduced member of a redox pair is associated to a ΔΔG < 0.
c. The reduction of the oxidized member of a redox pair is associated to a ΔΔG > 0
d. All of the above
e. None of the above
3.Which of the following statements is incorrect?
a. We only need to consume vitamins in small amounts
b. Vitamins are precursors to some coenzymes
c. Some vitamins are fat-soluble whereas others are soluble in water
d. All of the above
e. None of the above
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