A DNA strand has the sequence A-C-A-G-C-C-G-T-A. What would be the messenger RNA

Question

A DNA strand has the sequence A-C-A-G-C-C-G-T-A. What would be the messenger RNA transcribed from it? (Points : 2)        A-C-A-G-C-C-G-T-A
       A-C-A-G-C-C-G-U-A
       T-G-T-C-G-G-C-A-T
       U-G-U-C-G-G-C-A-U Question 52.52. How is the nucleic acid sequence of a strand of DNA related to the amino acid sequence of a protein? (Points : 2)        DNA is first replicated and then sections of the DNA replica are used to make protein.
       DNA is used to make messenger RNA which is used to make protein.
       Protein is manufactured directly from DNA without any intermediate.
       None of the above. Question 53.53. The process of protein synthesis within ribosomes using mRNA is called __. (Points : 2)        transcription
       derivation
       translation
       translocation Question 54.54. The triplet base sequence of tRNA nucleotides that is complementary to an mRNA codon (for a particular amino acid) is called ___. (Points : 2)        an anticodon
       a transposon
       a retroposon
       a cistron Question 55.55. Transcription of DNA ___. (Points : 2)        occurs in the cell nucleus.
       produces messenger RNA.
       must occur before translation can occur.
       All of the above. Question 56.56. A gene is essentially __. (Points : 2)        a single codon in a DNA molecule
       an entire chromosome
       a sequence of many codons in a DNA molecule that codes for a protein
       one half of a sister chromatid Question 57.57. Which of the following takes the genetic code to the cytoplasm __. (Points : 2)        transfer RNA
       messenger RNA
       ribosomal RNA
       DNA Question 58.58. In the DNA double helix, complementary base pairs are held together by __. (Points : 2)        peptide bonds
       ionic bonds
       N-glycosidic bonds
       hydrogen bonds Question 59.59. Which two Cambridge scholars built a DNA model in 1953 which was later donated to the National Science Museum? (Points : 2)        Krankee and Chegwin
       Watson and Crick
       Wilkins and Franklin
       Pauling and Astbury Question 60.60. If two people who are both carriers for a genetically inherited fatal recessive disease decide to become parents, what is the chance that their children will also be carriers? (Points : 2)        25%
       50%
       75%
       100% Question 61.61. Some people have AB blood types for the ABO blood system. They have all of the characteristics of both type A and type B blood--they are not a blend of them. The inheritance pattern responsible for this is referred to as __. (Points : 2)        codominance
       incomplete dominance
       complete dominance
       fusion Question 62.62. Cells of individuals with Down's syndrome usually have an extra chromosome 21. At which stage(s) of Meiosis has this error occurred? (Points : 2)        Anaphase I or II
       Prophase I
       Metaphase I or II
       Telophase II Question 63.63. A genetic trait that appears in every generation of offspring is called ___. (Points : 2)        phenotypic
       recessive
       dominant
       superior Question 64.64. Karyotype analysis __. (Points : 2)        is a means of detecting and reducing mutagenic agents
       is a surgical technique that separates chromosomes that have failed to segregate properly during meiosis II
       substitutes defective alleles with normal ones
       is used to detect chromosomal mutations and metabolic disorders in embryos Question 65.65. A segment of DNA that controls a hereditary trait is called a(n) ___. (Points : 2)        phenotype
       trait
       allele
       gene Question 66.66. Which is NOT a chromosomal aberration? (Points : 2)        deletion
       crossing over
       extra chromosomes
       inversion Question 67.67. A man who has type B blood and a woman who has type A blood could have children of which of the following phenotypes? (Points : 2)        A or B only
       AB only
       AB or O
       A, B, AB or O Question 68.68. When homologous chromosomes fail to separate during meiosis, this is termed __. (Points : 2)        non-disjunction
       cross over
       linkage
       disjunction Question 69.69. Which is most closely associated with the process of artificial selection? (Points : 2)        The large variety of breeds of dogs.
       A male lion's mane.
       The evolution of mimicry by walking sticks and other insects.
       A desire on the part of males to mate with certain females. Question 70.70. A group of mice becomes separated by the formation of a river. Over time, the northern mice became smaller and whiter, while the southern mice became larger and browner. This is an example of __. (Points : 2)        gigantification
       industrial melanism
       divergence
       homology Question 71.71. The individual considered the most fit, in an evolutionary sense, would be the __. (Points : 2)        individual with an appearance most attractive to the opposite sex
       individual who produces the greatest number of fertile offspring
       strongest individual
       individual who lives the longest Question 72.72. The spotted touch-me-not, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. Such an adaptation is favorable because it __. (Points : 2)        attracts insects that aid in pollination
       aids in the dispersal of the species
       prevents germination within the seed pod
       can prevent genetic changes to occur Question 73.73. Which concept was not included in Charles Darwin's theory of natural selection? (Points : 2)        punctuated equilibrium
       overproduction of offspring
       struggle for existence
       survival and reproduction of the fittest Question 74.74. Because of prolonged drought, the trees on an island are producing nuts that are much smaller with thicker and harder shells. This example illustrates ___ selection. (Points : 2)        stabilizing
       disruptive
       directional
       artificial Question 75.75. Which of the following is likely to have been the product of sexual selection? (Points : 2)        bright colors of female flowers
       the ability of desert animals to concentrate their urine
       camouflage coloration in animals
       a male lion's mane Question 76.76. The process in which a population moves into a relatively unexploited environment and then undergoes rapid evolutionary divergence to produce many separate species is called __. (Points : 2)        ontogeny
       convergent evolution
       disruptive selection
       adaptive radiation Question 77.77. A certain species of land snail exists as either a cream color or a solid brown color. Intermediately colored snails are rare. This illustrates __ selection. (Points : 2)        disruptive
       random
       stabilizing
       directional Question 78.78. Many introduced (invasive) species have had deleterious effects on communities and ecosystems because __. (Points : 2)        the introduced species are long-lived
       coevolved parasites and competitors are absent in the new habitat
       predators prefer the introduced species, and the local prey therefore proliferate to dangerously high levels
       the communities from which they came lost an important predator, competitor, or parasite Question 79.79. The vast majority of energy taken into an ecosystem is __. (Points : 2)        utilized by secondary consumers
       converted into biomass by plants
       utilized by primary consumers
       lost as heat Question 80.80. If biological magnification of a toxin occurs, the ___ will have the highest levels of toxins in their systems. (Points : 2)        producers
       herbivores
       primary carnivores
       top carnivores Question 81.81. Which of these is a population density-independent regulating factor? (Points : 2)        weather
       competition
       resource availability
       predation Question 82.82. An ecological niche is an organism's_______ in an ecosystem. (Points : 2)        function
       habitat
       location
       resources Question 83.83. No matter how rapidly a population grows, it will eventually reach a limit and begin to stabilize. This is called the ___ of the environment. (Points : 2)        growth rate
       succession
       carrying capacity
       life history Question 84.84. Sea anemones growing on the backs of crabs without damaging the crabs are an example of (Points : 2)        Parasitism
       Commensalism
       Mutualism
       Competition Question 85.85. All of the populations of different species that occupy and are adapted to a given area are referred to by which term? (Points : 2)        community
       biosphere
       species
       niche Question 86.86. A highly successful parasite will __. (Points : 2)        kill its host fairly rapidly
       benefit its host
       be able to feed without killing its host
       not harm its host A DNA strand has the sequence A-C-A-G-C-C-G-T-A. What would be the messenger RNA transcribed from it? (Points : 2)        A-C-A-G-C-C-G-T-A
       A-C-A-G-C-C-G-U-A
       T-G-T-C-G-G-C-A-T
       U-G-U-C-G-G-C-A-U

Explanation / Answer

The correct option is T-G-T-C-G-G-C-A-T

52. DNA is used to make messenger RNA which is used to make protein.

53. Translation

54. an anticodon

55. all the above

56. a sequence of many codons in a DNA molecule that codes for a protein

57. messenger RNA

58. hydrogen bonds

59. Watson and Crick

60. 50%

61. incomplete dominance

62. Anaphase I or II

63. dominant

64. is used to detect chromosomal mutations and metabolic disorders in embryos

65. allele

66. crossing over

67. A, B, AB or O

68. non-disjunction

69. The large variety of breeds of dogs

70. divergence

71. individual who produces the greatest number of fertile offspring

72. aids in the dispersal of the species

73. punctuated equilibrium

74. stabilizing

75. bright colors of female flowers

76. adaptive radiation

77. disruptive

78. coevolved parasites and competitors are absent in the new habitat

79. lost as heat

80. top carnivores

81. weather

82. location

83. carrying capacity

84. Commensalism

85. community

86. kill its host fairly rapidly

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