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The portion of the molecule in box 5 of Figure 12-1 is:

The portion of the molecule in box 5 of Figure 12-1 is:. a hydrogen bond. a pyrimidine . a nucleotide a phosphate. The final product of DNA replication is:. DNA fragments. mRNA, tRNA , and rRNA molecules. two DNA molecules, each of which contains one new and one old DNA strand.

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The portion of the molecule in box 5 of Figure 12-1 is:

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  1. The portion of the molecule in box 5 of Figure 12-1 is: • a hydrogen bond. • a pyrimidine. • a nucleotide • a phosphate.

  2. The final product of DNA replication is: • DNA fragments. • mRNA, tRNA, and rRNA molecules. • two DNA molecules, each of which contains one new and one old DNA strand. • the enzymes needed for further processes, such as DNA polymerase

  3. Which of the following cause the unwinding of the DNA double helix? • Primosome • DNA helicase • RNA primer • RNA polymerase • DNA polymerase

  4. A replication fork: • is a site where one DNA strand serves as a template, but the other strand is not replicated. • is created by the action of the enzyme RNA polymerase. • is only seen in prokaryotic chromosomes. • is a Y-shaped structure where both DNA strands are replicated simultaneously.

  5. Which of the following adds new nucleotides to a growing DNA chain? • DNA polymerase • Primase • RNA polymerase • DNA helicase • RNA primer

  6. Why does DNA synthesis only proceed in the 5' to 3' direction? • Because that is the direction in which the two strands of DNA unzip. • Because that is the only direction that the polymerase can be oriented. • Because the chromosomes are always aligned in the 5'to 3'direction in the nucleus. • Because the 3'end of the polynucleotide molecule is more electronegative than the 5'end. • Because DNA polymerases can only add nucleotides to the 3'end of a polynucleotide strand.

  7. The 5' end of each Okazaki fragment begins with: • a DNA primer binding to the template DNA. • a separate RNA primer. • the same RNA primer that began synthesis on the leading strand. • a small DNA primer. • DNA polymerase binding to the template DNA.

  8. The DNA strand that is replicated smoothly and continuously is called the: • primary strand. • first strand. • leading strand. • alpha strand. • lagging strand

  9. Okazaki fragments are joined together by: • DNA polymerase. • DNA ligase • RNA ligase. • primase. • RNA polymerase.

  10. What is the rounded hourglass-shaped globule? • Helicase • Nitrogen base • Ribosome • DNA

  11. According to Chargaff’s rule the following proportion exists in DNA • G=C • G>C • G<C • C=T

  12. If one side of the DNA strand is GTAATC, the other side will be this • GTAATC • ACGGCT • CATTAG • GGGCCC

  13. The nitrogen bases of the DNA molecule are held together by these • Covalent bonds • Phosphodiester bonds • Hydrogen bonds • Glue

  14. DNA is described as a double helix. Why? A. It is made of two strands of RNA. B. It has two complimentary strands that are coiled in a spiral. C. Every part of DNA has a matching part on another chromosome. D. It can replicate itself and made an identical copy.

  15. What term describes the phosphate, sugar, and nitrogenous base groupsthat make up DNA? A. RNA B. thymine C. nucleotide D. pyrimidine

  16. The process of copying a gene's DNA sequence into a sequence of RNA is called • Replication • Transcription • Translation • PCR

  17. The transcribing enzyme is • Ligase • DNA polymerase • RNA polymerase • amino-acyltransferase

  18. Which molecule contains the genetic code? • RNA • DNA • mRNA • tRNA

  19. Transcription occurs along a ____ template forming an mRNA in the ____ direction. • 5' to 3'; 5' to 3‘ • 5' to 3'; 3' to 5‘ • 3' to 5'; 5' to 3‘ • 3' to 5'; 3' to 5'

  20. RNA contains which bases? • adenine, thymine, guanine, cytosine, uracil • adenine, thymine, guanine, cytosine • thymine, guanine, cytosine, uracil • adenine, guanine, cytosine, uracil

  21. Which mode of information transfer usually does not occur? • DNA to DNA • DNA to RNA • DNA to protein • all occur in a working cell

  22. A DNA strand with the sequence AACGTAACG is transcribed. What is the sequence of the mRNA molecule synthesized? • AACGTAACG • UUGCAUUGC • AACGUAACG • TTGCATTGC

  23. Which of the following features is common to both DNA replication and transcription? • Nucleotides are added to the 3' end of the newly synthesized strand • Deoxyribonucleotidesare incorporated into the growing sequence • Both RNA and DNA polymerase require oligonucleotide priming • Both RNA and DNA polymerase initiate at promoter sequences

  24. The process of producing an amino acid polymer (polypeptide) from a RNA template is called __. • replication • transcription • translation • duplication

  25. Each amino acid in a protein is specified by • several genes. • a promoter. • an mRNA molecule. • a codon.

  26. When mRNA leaves the cell's nucleus, it next becomes associated with • proteins. • a ribosome. • tRNA. • RNA polymerase.

  27. Considering the structure of double stranded DNA, what kinds of bonds hold one complementary strand to the other? • ionic • covalent • Van der Waals • hydrogen • hydrophobic and hydrophilic

  28. What type of mutation is in the following DNA sequence? original: ATCGATCGCGAT mutated: ATCGAACGCGAT • Insertion • Translocation • Point • inversion

  29. In DNA guanine always pairs with • Adenine • Thymine • Cytosine • Uracil

  30. Enter question text... • Enter answer text...

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