Quiz 4 Answers – Flashcards
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The anticodon of the tRNA hydrogen binds to the codon of the mRNA by complementary base pairing.
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tRNAs carrying the correct amino acid recognize the proper codons on the mRNA because...
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DNA to mRNA to protein
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The central dogma of molecular biology states that the information contained within genes flows in which direction?
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A; T; G; C
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According to Chargaff's rules, ____ always pairs with ____, and ____ always pairs with ____.
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ACT
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For a DNA strand that contains the sequence AGT in the 5' to 3' direction, what nucleotides are found on the other DNA strand in the 5' to 3' direction?
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The two resulting DNA molecules each have one new DNA strand and one old strand form the original DNA molecule.
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DNA replication is called semiconservative because...
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Hydrogen Bonds
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What chemical force must be overcome in order to separate the two DNA strands during replication?
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Ensures that all amino acids are represented at least once by the code.
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Using three bases to represent each amino acid in a polypeptide...
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Initiation, Elongation Cycle, and Termination
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The stages of translation are...
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DNA; mRNA
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DNA replication makes a(n) ______ copy of the DNA strand, while transcription makes a(n) ______ copy of the DNA strand.
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mRNA Translation
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Which of the following events in gene expression control does NOT occur in the nucleus?
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Intron
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An intervening sequence of DNA that is not expressed is called a(n)...
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DNA
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What is the hereditary material found in all cells
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That the Earth must be very old.
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Critical to the theory of evolution, Darwin needed to include an idea that was not generally accepted by scientists or society at that time. That idea was...
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Each have adapted in very similar ways to similar habitats.
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The sugar glider Australia and the flying squirrel in North America are both small mammals with large expanses of loose skin between their fore- and hind-limbs allowing them to glide from tree to tree within their respective forest habitats. These two species are distantly related but are very similar in their overall appearance. Darwin's explanation for their similarity is that...
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People select which individuals breed and which ones do not.
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Which of the following is NOT a step in the process of natural selection?
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Reproductive Success
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Fitness refers to...
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Shared characteristics of two distinct groups show that those groups are related.
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What do fossils of transitional links illustrate?
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The vestigial organ is similar to a functional organ in a related species, having been passed down from a common ancestor.
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The presence of vestigial organs supports evidence of evolution because...
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Biochemical Evidence
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The fact that DNA is the molecule containing the genetic code for all life on Earth is a part of...
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Natural selection can only work on variation that already exists.
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Which of the following statements is true regarding evolution?
