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Twelfth Grade (Grade 12) DNA, RNA, and Genetics Questions

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Grade 12 DNA, RNA, and Genetics
Which property distinguishes an expression vector from a typical vector?
  1. possession of a recognition sequence for a restriction enzyme
  2. presence of reverse transcriptase
  3. a promoter sequence
  4. ability to replicate independently within the host
Grade 12 DNA, RNA, and Genetics
What characteristic makes plasmids useful as a vector?
  1. Many plasmids contain genes that convey antibiotic resistance.
  2. Plasmids do not need to be coaxed to infect cells by artificial means.
  3. Plasmids use the same origin of replication as eukaryotic cells.
  4. Plasmids can accommodate a large amount of DNA.
Grade 12 DNA, RNA, and Genetics
How does eukaryotic gene regulation differ from that of prokaryotic gene regulation?
  1. Prokaryotic gene regulation has no positive control.
  2. Prokaryotic gene regulation has no negative control.
  3. Prokaryotes undergo transcription and translation in the same location, whereas eukaryotes perform them in different locations.
  4. Prokaryotes use different locations for transcription and translation, whereas eukaryotes perform them in the same location.
Grade 12 DNA, RNA, and Genetics
DNA repair is present in all organisms.
  1. True
  2. False
Grade 12 DNA, RNA, and Genetics
Why are plant cells, as opposed to animal cells, particularly useful as hosts for recombinant DNA?
  1. Animal cells cannot be cultured.
  2. Plant cells can make totipotent stem cells.
  3. Plant cells have reverse transcriptase.
  4. Plant cells have plasmids.
Grade 12 DNA, RNA, and Genetics
If all factors are equal, which genetically altered food would be of the most concern to human health?
  1. food that contains an inserted gene that allows the plants to grow faster
  2. food that contains an inserted gene that produces beta-carotene in beans
  3. food that contains an inserted gene that promotes flowering
  4. food that contains an inserted gene that allows plants to grow in soil with a high salt concentration
Grade 12 DNA, RNA, and Genetics
Which statement about genomes is true?
  1. Most genes found in the genomes of complex organisms are not required for survival.
  2. As complexity increases, the number of genes increases more than the size of the genome.
  3. Prokaryotes develop more chromosomes as they become more complex.
  4. Compartmentalization of eukaryotic cells allows these organisms to have fewer genes than prokaryotes do.
Grade 12 DNA, RNA, and Genetics
For the two given DNA fragments, GTTCGACTAGGA and TGGGCATCG, ligation results in the product
  1. GTTCGACTAGGATGGGCATCG.
  2. TGGGCATCGGTTCGACTAGGA.
  3. both a and b
  4. neither a nor b
Grade 12 DNA, RNA, and Genetics
What is the purpose of Hox genes?
  1. control the differentiation of cells and tissues in the embryo
  2. turn off bad genes to make sure they are not expressed
  3. control codons produced by double checking mRNA
  4. all of the above
Grade 12 DNA, RNA, and Genetics
Which statement about recombinant DNA is true?
  1. All restriction endonucleases generate blunt end fragments.
  2. Hydrogen bonds between base pairs are very strong.
  3. Restriction endonucleases cut both strands of DNA at the same time.
  4. Sticky ends prevent DNA ligase activity.
Grade 12 DNA, RNA, and Genetics

This question is a part of a group with common instructions. View group »

Which part of the DNA fragment is represented by the letter "b"?
DNA Replication
  1. replication fork
  2. RNA primer
  3. Okazaki fragment
  4. leading strand
Grade 12 DNA, RNA, and Genetics
If a mutation in a silencer makes it more difficult for a transcription factor to bind, which result is most likely to occur?
  1. There will be a large increase in the transcription rates for most genes.
  2. The rate of transcription for a certain gene located near the silencer will be reduced.
  3. A specific gene near the silencer will be transcribed all the time.
  4. Transcription rates of all genes will be greatly reduced.
Grade 12 DNA, RNA, and Genetics
How do negative regulation and positive regulation in bacteria differ?
  1. Only negative regulation involves the use of promoters.
  2. Only positive regulation involves the use of promoters.
  3. Transcription is reduced in negative regulation when the promoter is bound.
  4. Transcription is reduced in positive regulation when the promoter is bound.
Grade 12 DNA, RNA, and Genetics
What type of mutation is this?

Original: AAA GCA ATA GGG

Mutation: AAA GAA TAG GGC
  1. Point
  2. Chromosomal
  3. Frameshift
  4. Point and Frameshift
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