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- 1. Multiple ChoiceThe process that makes an exact copy of a cell’s DNA is calledconservation.preservation.replication.synthesis
- 2. Multiple ChoiceWhat are the main functions of DNA polymerase?. breaks hydrogen bonds and exposes basesholds DNA strands apart and attracts baseszips and unzips the double-stranded DNAbinds nucleotides and corrects base pair errors
- 3. Multiple ChoiceWhich of the following events occurs directly after a DNA molecule is unzipped?Mismatched nucleotide bases are identified and replaced.Free-floating nucleotides pair up with exposed bases.Identical double-stranded DNA molecules are formed.Enzymes break hydrogen bonds between base pairs.
- 4. Multiple ChoiceThe process of making new DNA molecules is semiconservative. This means that every new DNA molecule is composed oftwo completely identical strands of DNA.one original and one new strand of DNA.one strand of DNA and one strand of RNA.two strands that mix original and new DNA.
- 5. Multiple ChoiceWhen new DNA molecules are formed, almost all errors are detected and fixed bythe correct nucleotide.the sugar-phosphate backbone.DNA polymerase.one DNA strand.
- 6. Multiple ChoiceThe central dogma of molecular biology states that information flows in one direction fromnuclei to RNA to cytoplasm.ribosomes to proteins to DNAgenes to nuclei to ribosomes.DNA to RNA to proteins.
- 7. Multiple ChoiceChoose the nucleotide sequence of the RNA strand that would be complementary to the following DNA strand: GTAGTCA.UATUAGAACGACTGCAUCAGUCATCAGT
- 8. Multiple ChoiceThe main function of tRNA is tocarry a message that, when translated, forms proteins.form a portion of ribosomes, a cell’s protein factories.string together complementary RNA and DNA strands.bring amino acids from the cytoplasm to the ribosomes.
- 9. Multiple ChoiceWhich of the following events occurs directly after RNA polymerase recognizes the transcription start site of a gene?The polymerase strings amino acids into a polypeptideFree-floating nucleotides pair up with exposed DNA bases.A complementary RNA strand detaches itself from the DNA.The DNA strand begins to unwind, separating the two strands.
- 10. Multiple Choice5. A primary difference between transcription and replication is that transcriptionhappens repeatedly throughout a single cell cycle.occurs within the nucleus of eukaryotic cells.is catalyzed by large and complex enzymes.. proceeds according to careful cellular control.
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