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Protein: Quiz


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Question 1: Short proteins can also be synthesized chemically by a family of methods known as ________, which rely on organic synthesis techniques such as chemical ligation to produce peptides in high yield.
Organic chemistryAmino acidCarboxybenzylPeptide synthesis

Question 2: The best-known role of proteins in the cell is as ________, which catalyze chemical reactions.
Enzyme inhibitorAdenosine triphosphateEnzymeCofactor (biochemistry)

Question 3: Noted examples at the time included albumin from ________, blood serum albumin, fibrin, and wheat gluten.
Amino acidEgg (food)Egg whiteEgg yolk

Question 4: [11] Genes encoded in DNA are first transcribed into pre-messenger RNA (mRNA) by proteins such as ________.
RNA polymerase IITelomeraseRNA polymeraseRNA-dependent RNA polymerase

Question 5: Like other biological macromolecules such as polysaccharides and ________, proteins are essential parts of organisms and participate in virtually every process within cells.
DNARNANucleic acidNucleic acid analogues

Question 6: The resulting mixture can be purified using ultracentrifugation, which fractionates the various cellular components into fractions containing soluble proteins; membrane ________ and proteins; cellular organelles, and nucleic acids.

Question 7: From this data ________ can be constructed and evolutionary hypotheses developed using special software like ClustalW regarding the ancestry of modern organisms and the genes they express.
Phylogenetic treeComputational phylogeneticsCommon descentCladistics

Question 8: ________ and elastin are critical components of connective tissue such as cartilage, and keratin is found in hard or filamentous structures such as hair, nails, feathers, hooves, and some animal shells.
Collagen, type II, alpha 1CollagenLysyl hydroxylaseCollagen, type I, alpha 1

Question 9: Some ingested amino acids are used for protein biosynthesis, while others are converted to glucose through gluconeogenesis, or fed into the ________.
MetabolismGlycolysisCitric acid cycleBiochemistry

Question 10: [27] The amino acids that an organism cannot synthesize on its own are referred to as ________.
Essential amino acidMethionineLysineGlutamic acid

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