B.E. Chpt 12

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B.E. Chpt 12
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2011-05-21 00:16:21
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biology exam
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questions from chapter 12
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  1. DNA is composed of sugars, bases, and_____
    A.) hydrogens
    B.)chlorines
    C.) peptides
    D.)phosphates
    D.) phosphates
    (this multiple choice question has been scrambled)
  2. In DNA, Adenine bonds with ______
    A.) hydrogens
    B. Guanine
    C.) Thymine
    D.) Cytosine
    C.) Thymine
    (this multiple choice question has been scrambled)
  3. The model of DNA was first built by __________
    A.) Watson-Crick
    B.) Pauling
    C.) Griffith
    D.) Hershey-Chase
    A.) Watson-crick
    (this multiple choice question has been scrambled)
  4. Which of the following is NOT found on a strand of DNA?
    A.) hydrogen bonds
    B.) deoxyribose
    C.) uracil
    D.) thymine
    C.) uracil
    (this multiple choice question has been scrambled)
  5. Where in the cell does DNA replication take place?
    A.) rough ER
    B.) nucleus
    C.) cytoplasm
    D.) ribosome
    B.) nucleus
    (this multiple choice question has been scrambled)
  6. Hershey- Chase concluded that ____________
    A.) Protien bases were the genetic material
    B.) DNA was the genetic material
    C.) RNA was the genetic material
    D.) DNA and RNA were found in the cell's nucleus
    B.) DNA was the genetic material
    (this multiple choice question has been scrambled)
  7. All of the following are true about the structure of DNA ecxcept___________
    A.) DNA consists of two long strands of nucleotides joined by hydrogen bonds
    B.) DNA is a single strand of nucleotides
    C.) every DNA nucleotide contains sugar, phosphate, and a base
    D.) the long strand of nucleotides are twisted into a double helix
    B.) DNA is a single strand of nucleotids
    (this multiple choice question has been scrambled)
  8. X-ray diffraction photographs were taken by?
    A.) Griffith
    B.) Hershey-Chase
    C.) Wilkins and Franklin
    D.) Pauling
    C.) Wilkins and Franklin
    (this multiple choice question has been scrambled)
  9. The amount of guanine is always equal to the amount of______?
    A.) adenini
    B.) protein
    C.) thymine
    D.) cytosine
    D.) cytosine
    (this multiple choice question has been scrambled)
  10. during DNA replication, what would be the complementary strand of CCTAGCT?
    A.)TTGCATG
    B.) CCTAGCT
    C.)GGGAUGA
    D.) GGATCGA
    D.) GGATCGA
    (this multiple choice question has been scrambled)
  11. the enzyme responsible for adding new nucleotides to the growing DNA strand in DNA replication is?
    A.) helicase
    B.) DNA polymerase I
    C.) DNA polymerase III
    D.) RNA polymerase
    C.) DNA polymerase III
    (this multiple choice question has been scrambled)
  12. New DNA nucleotides must always be added to the _____ end of the growing strand.
    A.) 3'
    B.) 5'
    C.) a or b
    D.) phosphate
    A.) 3'
    (this multiple choice question has been scrambled)
  13. The enzyme responsible for unwinding the DNA during replication is ___?
    A.) DNA polymerase III
    B.) RNA polymerase
    C.) DNA polymerase I
    D.) helicase
    D.) helicase
    (this multiple choice question has been scrambled)
  14. If a mutation during DNA replication were to occur, what enzyme corrects the mutation?
    A.) helicase
    B.) RNA polymerase
    C.) DNA polymerase III
    D.) DNA polymerase I
    D.) DNA polymerase I
    (this multiple choice question has been scrambled)
  15. The function of rRNA is to __?
    A.) transfer amino acids to ribosomes
    B.) Synthesize mRNA
    C.) form ribosomes
    D.) synthesize DNA
    C.) form ribosomes
    (this multiple choice question has been scrambled)
  16. During transcription,_________
    A.) Translation occurs
    B.) DNA is replicated
    C.) RNA is produced
    D.) Proteins are synthesized
    C.) RNA is produced
    (this multiple choice question has been scrambled)
  17. dWhat enzyme unwinds DNA and produces complementary RNA nucleotides during transcription?
    A.) RNA polymerase
    B.) helicase
    C.) DNA [olymerase III
    D.) DNA polymerase I
    A.) RNA polymerase
    (this multiple choice question has been scrambled)
  18. Transcription proceeds when RNA polymerase ______
    A.) binds to a strand of RNA
    B.) attaches to a promoter on the DNA
    C.) binds to a strand of DNA
    D.) attaches to a ribosome
    B.) attaches to a promoter on the DNA
    (this multiple choice question has been scrambled)
  19. The operon consists of ___________
    A.) promoter and operator
    B.) repressors
    C.) promoter and repressors
    D.) operator and repressors
    A.) promoter and operator
    (this multiple choice question has been scrambled)
  20. Each nucleotide triplet in mRNA that specifies as particular amino acids is called a(n)
    A.) anticodon
    B.) mutagen
    C.) exon
    D.) codon
    D.) codon
    (this multiple choice question has been scrambled)
  21. Which of the following would represent the strand of DNA from wich the mRNA strand CUCAAGUGCUUC was made?
    A.) GAGTTCACGAAG
    B.) GAGUUCACGAAG
    C.) AGACCTGTAGGA
    D.) CUCAAGUGCUUC
    A.) GAGTTCACGAAG
    (this multiple choice question has been scrambled)
  22. each of the following is a type of RNA exept?
    A.) carrier RNA
    B.) transfer RNA
    C.) ribosomol RNA
    D.) messenger RNA
    A.) carrier RNA
    (this multiple choice question has been scrambled)
  23. At the very beginning of translation, the first tRNA molecule
    A.) attaches to the P site of the ribosome
    B.) connects an amino acid to its anticodon
    C.) binds to the ribosome's A site
    D.) attaches directly to tthe DNA codon
    A.) attaches to the P sites of the ribosome
    (this multiple choice question has been scrambled)
  24. The first amino acid for any protien is _
    A.) leucine
    B.) trypotophan
    C.) proline
    D.) methionine
    D.) methionine
    (this multiple choice question has been scrambled)
  25. in order for protein synthesis to occur, mRNA must migrate to the _
    A.) mitochondria
    B.) plasma membrane
    C.) cytoplasm
    d.) nonn of the above
    C.) cytoplasm
    (this multiple choice question has been scrambled)
  26. during translation, mRNA is made into
    A.) proteins
    B.) ribosomes
    C.) DNA
    D.) tRNA
    A.) proteins
    (this multiple choice question has been scrambled)
  27. during translation, the amino acids are held together by _
    A.) peptide-bonds
    B.) sugars
    C.) hydrogen bonds
    D.) phosphates
    A.) peptide- bonds
    (this multiple choice question has been scrambled)
  28. the function of an operator is to
    A.) control the introns and exons
    B.) turn on and off the molecules of tRNA
    C.) generate amino acids for protein synthesis
    D.) regulate access of RNA polymeraseto specific genes
    D.) regulate access of RNA polymerase to specifice genes
    (this multiple choice question has been scrambled)
  29. cells must control gene expression so tha
    A.) their gene will always be expressed
    B.) genetic disorders can be corrected
    C.) their genes will never be expressed
    D.) their genes will only be expressed when needed
    D.) their genes will only be expressed when needed
    (this multiple choice question has been scrambled)
  30. A repressor protein
    A.) prevents DNA synthesis
    B.) blocks RNA polymerase from attaching to the DNA
    C.) destroys amino acids befor protein synthesis occurs
    D.) attaches to the ribosome during translation
    B.) blocks RNA polymerase from attaching to the DNA
    (this multiple choice question has been scrambled)
  31. the non-coding region of DNA that is not transcribed is
    A.) exons
    B.) introns
    C.) exoposons
    D.) mutons
    B.) introns
    (this multiple choice question has been scrambled)
  32. during translation, after the P site is filled what is the next site to recieve a tRNA molecule?
    A.) A site
    B.) G site
    C.) E site
    D.) stop site
    A.) A site
    (this multiple choice question has been scrambled)
  33. what type of mutatio

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