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Search Results for genes - All Grades

650 questions match "genes". Refine Your Search

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Grade 10 DNA, RNA, and Genetics
Gene flow can be caused by
  1. Mutation
  2. Genetic equilibrium
  3. Migration
  4. Genetic drift
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
Which statement about the trp operon is TRUE?
  1. The trp operon codes for proteins needed for tryptophan synthesis.
  2. The trp operon condes for proteins that metabolizes tryptophan.
  3. The trp operon activates only in the presence of tryptophan.
  4. The trp operon can be induced when tryptophan is present.
Grade 9 DNA, RNA, and Genetics
Grade 9 DNA, RNA, and Genetics
Why is it necessary for a cell to regulate its gene expression?
  1. to prevent producing proteins that are not needed in the cell
  2. to be efficient
  3. to be able to respond to changing conditions
  4. all of the above are reasons that gene expression must be regulated
Grade 7 Macromolecules
What is the code for a specific amino acid?
  1. a single base
  2. a set of two bases
  3. a group of three bases
  4. two base pairs together
Grade 7 DNA, RNA, and Genetics
What would the complementary DNA stand be to this DNA sequence AGT-CGA-CCG-AAT?
  1. ATC-GCT-TTA-GCG
  2. TCA-GCT-GGC-TTA
  3. GGG-CGC-TTA-TAG
  4. TAG-TAC-GAG-TTC
Grade 7 DNA, RNA, and Genetics
The twisted shape of DNA is called a                .
  1. double ladder
  2. double helix
  3. nucleotide
  4. base pair
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, while eukaryotes perform them in different locations.
  4. Prokaryotes use different locations for transcription and translation, while eukaryotes perform them in the same location.
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
Grade 12 DNA, RNA, and Genetics
If a mutation in a silencer makes it more difficult for it to bind, which of the following 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.
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