NAME: ________________________

AP Biology 18,19,20 Test

Question Types


Start With


Question Limit

of 96 available terms

Upgrade to
remove ads

5 Written Questions

5 Matching Questions

  1. Genetically engineered plants
    A) are banned throughout the world.
    B) are more difficult to engineer than animals.
    C) include a transgenic rice plant that can help prevent vitamin A deficiency.
    D) are being rapidly developed, but traditional plant breeding programs are still the only method used to develop new plants.
    E) are able to fix nitrogen themselves.
  2. Use the following information to answer the following questions.
    InDrosophila after ~100 minutes postfertilization, the embryo looks like the following diagram, with all nuclei having moved to the periphery and, subsequently, four of the nuclei being sequestered at the posterior end. The four sequestered cells at one end are most probably destined to become
    A) mouthparts.
    B) antennae.
    C) the legs of the adult fly.
    D) the germ cells of the adult.
    E) wing primordial.
  3. In recent times, it has been shown that adult cells can be induced to become pluripotent stem cells (iPS). In order to make this conversion, what has been done to the adult cells?
    A) Cytoplasm from embryonic cells is injected into the adult cells.
    B) An adenovirus vector is used to transfer embryonic gene products into adult cells.
    C) The nucleus of an embryonic cell is used to replace the nucleus of an adult cell.
    D) A retrovirus is used to introduce four specific regulatory genes.
    E) The adult stem cells must be fused with embryonic cells.
  4. As genetic technology makes testing for a wide variety of genotypes possible, which of the following is likely to be an increasingly troublesome issue?
    A) discrimination against certain racial groups because of major genetic differences
    B) the need to legislate for the protection of the privacy of genetic information
    C) using technology to identify genes that cause criminal behaviors D) alteration of human phenotypes to prevent early disease
    E) use of genotype information to provide positive identification of criminals
  5. A eukaryotic gene has "sticky ends" produced by the restriction endonucleaseEcoRI. The gene is added to a mixture containingEcoRI and a bacterial plasmid that carries two genes conferring resistance to ampicillin and tetracycline. The plasmid has one recognition site for EcoRI located in the tetracycline resistance gene. This mixture is incubated for several hours, exposed to DNA ligase, and then added to bacteria growing in nutrient broth. The bacteria are allowed to grow overnight and are streaked on a plate using a technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicillin, nutrient broth plus tetracycline, nutrient broth plus ampicillin and tetracycline, and nutrient broth without antibiotics.
    Bacteria that do not take up any plasmids would grow on which media?
    A) the nutrient broth and the tetracycline broth
    B) all three broths
    C) the tetracycline broth and the ampicillin broth
    D) the nutrient broth and the ampicillin broth
    E) the nutrient broth only
  1. a B) the need to legislate for the protection of the privacy of genetic information
  2. b C) include a transgenic rice plant that can help prevent vitamin A deficiency
  3. c E) the nutrient broth only
  4. d D) the germ cells of the adult
  5. e D) A retrovirus is used to introduce four specific regulatory genes

5 Multiple Choice Questions

  1. B) epigenetic phenomena
  2. D) misfolded versions of normal brain protein
  3. D) apoptosis of a virally infected cell
  4. D) D
  5. D) post-transcriptional processing

5 True/False Questions

  1. A researcher introduces double-stranded RNA into a culture of mammalian cells, and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. Within the first quarter hour, the researcher sees that the intact RNA is found in the cells. After 3 hours, she is not surprised to find that
    A) the double-stranded RNA binds to mRNAs to prevent translation.
    B) the double-stranded RNA replicates itself.
    C) the RNA is degraded by 5' and 3' exonucleases.
    D) Dicer enzyme has reduced it to smaller double-stranded pieces.
    E) the double-stranded RNA binds to tRNAs to prevent translation.
    D) Dicer enzyme has reduced it to smaller double-stranded pieces

          

  2. For a particular microarray assay (DNA chip), cDNA has been made from the mRNAs of a dozen patients' breast tumor biopsies. The researchers will be looking for
    A) a pattern shared among some or all of the samples that indicates gene expression differing from control samples.
    B) a pattern of fluorescence that indicates which cells are overproliferating.
    C) a group of cDNAs that match those in non-breast cancer control samples from the same
    population.
    D) a group of cDNAs that act differently from those on the rest of the grid.
    E) a particular gene that is amplified in all or most of the patient samples.
    B) the amino acid acts as a corepressor

          

  3. Some viruses can be crystallized and their structures analyzed. One such virus isDesmodium, or yellow mottle virus, which infects beans. This is a member of the tymovirus group and has a single-stranded RNA genome of ~6,300 nucleotides. Its virion is 25—30 nm in diameter, and is made up of 180 copies of a single capsid protein that self-associate to form each capsomere, which has icosahedral symmetry with 20 facets.
    If this virus has capsomeres with 20 facets, how many proteins form each one?
    A) 1
    B) ~6
    C) 5
    D) ~180
    E) ~20
    E) retroviruses

          

  4. If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then
    A) the amino acid inactivates the repressor.
    B) the amino acid acts as a corepressor.
    C) the repressor is active in the absence of the amino acid.
    D) the enzymes produced are called inducible enzymes.
    E) the amino acid turns on transcription of the operon.
    C) a YAC with appropriate cellular enzymes

          

  5. Some viruses can be crystallized and their structures analyzed. One such virus isDesmodium, or yellow mottle virus, which infects beans. This is a member of the tymovirus group and has a single-stranded RNA genome of ~6,300 nucleotides. Its virion is 25—30 nm in diameter, and is made up of 180 copies of a single capsid protein that self-associate to form each capsomere, which has icosahedral symmetry with 20 facets.
    How many nucleotides of the genome would you expect to find in one capsid?
    A) ~20
    B) ~6
    C) ~6,300
    D) ~180
    E) 1
    E) retroviruses

          

Create Set