63. The molecule that carries the message of the gene from the nucleus to the ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 64. The molecule that carries the amino acid to the ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 65. A molecule that is a component of a ribosome is A. DNA. B. tRNA. C. mRNA. D. rRNA. Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.03 Section: 08.04 Topic: Molecular Biology 66. During
transcription, free nucleotides of RNA bond with ____ nucleotides. A. DNA B. other tRNA C. mRNA D. rRNA Bloom's Level: 1. Remember Learning Outcome: Define gene, transcription, translation. Section: 08.04 Topic: Molecular Biology 67. ____ code(s) for the placement of one amino acid. A. Three codons B. One nucleotide C. Three nucleotides D. One intron Bloom's Level: 1. Remember Learning Outcome: Accurately use the codon table to predict the amino acid sequence of a protein. Section: 08.02 Section: 08.04 Topic: Molecular Biology 68. The promoter sequence of DNA is located A. behind the initiator codon. B. ahead of the initiator codon. C. immediately ahead of the gene. D. behind the gene. Bloom's Level: 1. Remember Learning Outcome: Explain how promoters, transcription factors, and splicing affect transcription. Section: 08.04 Topic: Molecular Biology 69. This occurs when insertions or deletions cause the ribosome to read the wrong sets of three nucleotides. A. point mutation B. frameshift C. translocation D. transcription Bloom's Level: 2. Understand Learning Outcome: Provide examples of insertions, deletions, and frameshift mutations. Section: 08.06 Topic: Molecular Biology 70. If a drug interferes with the activities of transfer RNA, which one of the following is likely to occur? A. DNA will not be able to make copies of itself. B. Proteins will not be produced. C. Mutations will occur to the DNA. D. Messenger RNA will not be manufactured. Bloom's Level: 5. Evaluate Learning Outcome: Explain the use of mRNA and tRNA in the process of translation. Section: 08.04 Topic: Molecular Biology 71. Which of the following is necessary for DNA to make copies of itself? A. Ribosomes must be present. B. The cell must have an abundant supply of RNA nucleotides. C. The two strands of the DNA molecule must separate. D. Chromosomes must be synapsed. Bloom's Level: 1. Remember Learning Outcome: Describe DNA replication using base-pairing rules and DNA polymerase. Section: 08.02 Topic: Molecular Biology
A. one
B. five
C. ten
D. fifteen
D. fifteen
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Which of the following is not a characteristic of a riboswitch?
A. They are structures that can form in the 5' untranslated region of some mRNA molecules. B. They exert gene expression control only at the level of translation. C. They may physically bind to small-molecule metabolites. D. Ligand-binding to a riboswitch may sequester the Shine-Dalgarno sequence.
One day during the summer you and some friends make ice cream using an electric ice cream maker. To get the ice cream to form, a mixture of salt and ice is packed around the ice cream maker. A few days later you notice a yellow circle of dead grass where the ice cream maker had been placed. You hypothesize that some of the salt and ice mixture spilled onto the grass and ________.
A. was isosmotic to the grass cells causing the yellow circle of dead grass B. froze the grass C. was hypoosmotic to the grass cells causing the yellow circle of dead grass D. was hyperosmotic to the grass cells causing the yellow circle of dead grass
Water ecosystems become eutrophic when there is ________.
A. nutrient enrichment of waters B. acidification of waters C. nutrient removal from waters D. deoxygenation of waters
Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?
A. random collisions B. chemical attractions C. receptor specificity D. both chemical attractions and receptor specificity E. random collisions, chemical attractions, and receptor specificity