Science Quiz / A few of my favorite Enzymes!

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Can you name the Exam 1 Enzymes?

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Enzyme FunctionEnzyme
Cleaves Leu, Ile & Val on amino side
Binds to cyclins to regulate the cell cycle
Found on UMP Synthase; Facilitates formation of UMP
Nonprotein component that are bound but not necessary
Enzyme involved in reaction of PRPP and Glutamine to 5-phophoribosylamine and glutamate
One of two enzymes involved in Poly-A retrotransposition that isn't reverse transcriptase
Class of enzymes involved in formation of covalent bonds between Carbon & Sulfur, Nitrogen or Oxygen
Recombination protein: makes nicks for resolution
Recombination protein: generation of ssDNA with 3' overhang
Introduces swivel points in DNA to relax positive supercoils; Type that is ATP Independent
Hydrolyzes disaccharides and products of amylases; Brush border enzymes
Puts initial RNA primer down
Cleaves Tyr, Trp & Phe on their carboxyl side
Prokaryotic DNA: Removes RNA primer and involved in DNA repair in Prokaryotes
Class of enzymes involved in hydrolytic cleavage of covalent bonds between carbon and another atom
Eukaryotic DNA: Similary to polymerase I, functions in repair
Enzymes that phosphorylate proteins; Involved in intracellular signalling
Eukaryotic RNA polymerase: Transcribes tRNA, some rRNA & some snRNA
Mediates CSSR
Part of RNA Polymerase core: Recognizes the regulatory sequence in the promoter of DNA
Involved in transfer of glycan to asparagine residues
Class of enzymes involved in molecular rearrangement in a molecule
One of two enzymes involved in LTR retrotransposition that isn't Reverse transcriptase
Cleaves phosphate backbone of DNA
Part of RNA Polymerase core: Holds on to the DNA template
Hydrolyzes alpha-1,4 glycosidic bonds in starch and glycogen in the stomach
Converts Hypoxanthine into Xanthine and then into Uric Acid
Competes for active site; Increases Km of enzyme
Found on UMP Synthase; Facillitates formation of OMP
Prokaryotic DNA: No proofreading activity, DNA repair
Enzyme FunctionEnzyme
Eukaryotic RNA polymerase: Transcribes all protein coding genes & SnoRNA, miRNA, SiRNA, and most SnRNA
Reacts with all Amino Acids except for the C-terminal
Adds ribonucleotides to 3' end of growing RNA
Eukaryotic DNA: tightly interacts with primase
Prokaryotic DNA: Involved in DNA repair, lacks proofreading
Found on CAD; Facilitates formation of carbamoylphosphate
Part of RNA Polymerase core: Catalyzes phosphodiester backbone formation in 5'-->3' direction
Prokaryotic DNA: Adds 9000 bp/min/enzyme, replicates most of DNA in e. coli
Introduces double strand breaks in meiotic DNA cells
Eukaryotic DNA: polymerase of leading strand
Forms ESI complex; lowers Vmax of enzyme
Removes damaged DNA bases
Binds TATA box and recurits TAFs to form TFIIID
Recognizes specific tRNA and catalyzes attachment of Amino Acid
Class of enzymes involved in nonhydrolytic cleavages between carbon & N,C or S
Hydrolyzes lactose to glucose and galactose
Found on CAD; Facilitates formation of Dihyrdroorate
Part of RNA Polymerase holoenzyme: Increases affinity of RNA polymerase core for promoter DNA by 10,000x
Eukaryotic RNA polymerase: Transcribes 5.8S, 18S & 28S rRNA genes
Initiaties Nucleophilic attack on A residue within intron initiates cut at 5' splice site
Other of two enzymes involved in purine salvage pathway
Recombination protein: stabilization of ssDNA, assembles Holliday junction
Found on CAD; Facilitates formation of carbamoylaspartate
Seals single strand nicks in DNA
Hydrolyzes maltose and maltotriose to glucose
Nonprotein component that helps transfer functional groups
Nonprotein groups bound to enzyme
Class of enzymes that are involved in oxidation/reductiion reactions; Most use NAD, NADP or FAD
Involved in synthesis of TMP
Eukaryotic DNA: polymerase of lagging strand
Enzyme FunctionEnzyme
Cleaves C-terminal residue in proteins
Hydrolyzes alpha-1,4 glycosidic bonds in starch and glycogen in the mouth
Converts nucleotide diphosphates into deoxyribonucleotides
Hydrolyzes sucrose to glucose and fructose
Cleaves Lys & Arg on their carboxyl side
Modifies Histone tail by removing acetly group
Availability of these can determines activation of retinoblastoma protein
Adds nucleotides to growing DNA strand; 3'-5' exonuclease activity, 5'-3' exonuclease activity
Add sugars to membrane bound lipid, Dolicol-phosphate
Introduces negative supercoils into prokaryotic DNA
Reverse transcriptase; Adds repeating units to 5' end of DNA
Enzymes with multiple active sites; Have a hill coefficient >1
Introduces swivel points in DNA to relax positive supercoils; Type that is ATP dependent
Act as CI with PABA to prevent folic acid production in bacteria
Hydrolyzes alpha-limit dextrins
Eukaryotic DNA: mitochondrial polymerase
Converts Adenosine into Inosine
Removes abasic nucleotide
Helicase + ssDNAbp + Primase + Polymerase III Holoenzyme
Involved in recombination: Used for DNA transposition
Same enzymes formula, but different structural arrangements
Recombination protein: branch migration
Catalyzes unwinding of DNA
Found in mitochondria; Facillitates formation of Orotate
Binds single stranded DNA tightly and prevents degradation
One of two enzymes involved in purine salvage pathway
Assembles from U1-U6 proteins & snRNA; Involved in splicing
Modifies Histone tail by adding acetly group
Class of enzymes involved in transfer of a chemical group from a donor to an acceptor

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