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12 Cards in this Set
- Front
- Back
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Why are multiple origins of replication necessary for DNA replication in eukaryotes? A. Eukaryal cells typically have linear chromosomes rather than circular, so multiple origins of replication ensures all the DNA is replicated B. Eukaryal DNA polymerases are significantly less reliable than bacterial polymerases, so multiple origins of replication minimizes the number of errors during replication C. Eukaryal genomes are typically much larger than bacterial genomes, so multiple origins of replication ensures all the DNA is able to be replicated in a reasonable amount of time D. All of these choices |
C. Eukaryal genomes are typically much larger than bacterial genomes, so multiple origins of replication ensures all the DNA is able to be replicated in a reasonable amount of time |
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Which of these best differentiates DNA and RNA? A. RNA is single-stranded and DNA is double stranded B. RNA contains ribose and DNA contains deoxyribose C. RNA contains the base uracil in place of thymine, which is in DNA D. Both A and B are true E. A, B, and C are true |
E. A, B, and C are true |
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(True/False) The DNA replication process in Archaea more closely resembles that in Eukarya than in Bacteria. |
True |
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The Hershey and Chase experiment was able to conclusively demonstrate that DNA, not protein, was the genetic material. They were able to distinguish DNA from protein since labeled _____ incorporated into DNA while labeled _____ incorporated into proteins. A. nitrogen; sulfur B. magnesium; nitrogen C. nitrogen; magnesium D. phosphorous; sulfur E. sulfur; nitrogen |
D. Phosphorus; sulfur |
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What are micro RNAs? A. mRNAs that encode for regulatory proteins B. Small regulatory RNAs C. tRNAs D. rRNAs E. Small mRNAs |
B. Small regulatory RNAs |
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What did the experiment by Avery, MacLeod, and McCarty in 1944 with the R and S strains of Streptococcus pneumoniae demonstrate? A. DNA was the genetic material in cells B. R strain phenotype could spontaneously revert to S strain phenotype C. Genetic material from one strain could be transferred to another strain D. The ability of these bacteria to kill mice E. That some strains of Streptococcus were not pathogenic |
A. DNA was the genetic material in cells |
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After the translational process the polypeptide folds into the appropriate conformation for proper functioning. What group of proteins aids in protein folding? A. Proteases B. Cytokines C. Chaperonins D. Peptidases E. Lipases |
C. Chaperonins |
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What is the correct sequence of protein action during DNA replication? 1. DNA polymerase 2. Single stranded binding proteins 3. DNA ligase 4. Helicase 5. Primase
A. 5-4-1-2-3 B. 4-5-2-1-3 C. 2-5-4-1-3 D. 5-1-2-4-3 |
B. 4-5-2-1-3 |
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Match the mutations with the correct definition. A. Silent mutation B. Missense mutation C. Nonsense mutation D. Inversion E. Translocation |
A: A mutation that does not result in change in the amino acid sequence B: A mutation that results in a change in the amino acid sequence C: A mutation that results in a premature stop codon in the amino acid sequence D: A section of the DNA is inverted and reinserted into the chromosome E: A segment of the DNA breaks off and reattaches at a different location |
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Basic proteins that help to package the DNA in eukaryal cells are called ________. |
Histones |
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The site on the DNA molecule that is recognized by the sigma subunit of the RNA polymerase for binding to start transcription is called the _________. |
Promoter |
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(True/False) Transcription is the synthesis of RNA from a DNA template and translation is the synthesis of a peptide from a RNA template. |
True |
