The helical turns of the DNA does not only provide spaces for binding with regulatory proteins but they cause the molecule to resemble a spiral staircase. True False
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The helical turns of the DNA does not only provide spaces for binding with regulatory proteins but they cause the molecule to resemble a spiral staircase.
- True
- False
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- In analyzing the base composition of a DNA sample, a student loses the information on pyrimidine content. The purine content is A = 27% and G = 23%. Using Chargaffs rule, reconstruct the missing data and list the base composition of the DNA sample.true or false: a nucleotide’s 5 end provides the energy to synthesize a new strand of DNA.TRUE OR FALSE a) The 2 chains composing one double helix run in opposite directions; they are antiparallel (one is 5’->3’ and the other 3’->5’). b) DNA molecules can perform their function in replication and transcription as long as the hydrogen bonds between the bases remain intact.
- RNA shares with proteins the ability to fold into complex three-dimensional shapes. As a result, RNA molecules can, like protein molecules, catalyze biochemical reactions (that is, both kinds of molecules can act as enzymes, or biological catalysts). These statements are not true of DNA. Why can some RNA molecules act as enzymes whereas DNA molecules cannot?True or false! aug are the first 3 nucleotides synthesized during transcription in a eukaryotic cell. column purification of dna allows the dna to flow through column while other molecules are trappedtrue or false: Hydrophobic interactions between bases are the primary stabilizing forces responsible for maintaining the DNA double helix.
- The introduction to this chapter, which describes the sequencing of 4000-year-old DNA, emphasizes DNA’s extreme stability. What aspects of DNA’s structure contribute to the stability of the molecule? Why is RNA less stable than DNA?The " backbone " of single strand of DNA is comprised of the alternating phosphate and sugar molecules whereas the nitrogenous bases are not considered part of the backbone . True or FalseIn one paragraph, using your own words, describe the structure of DNA. Be sure to include the following terms: nucleotide, phosphate, adenine, cytosine, guanine, and thymine.
- One strand of a DNA molecule contains the base sequence 5'-ACTTGCCA-3'. Write its complementary base sequence.Shown below is a DNA coding strand: 5' T-A-C-T-T-C-C-C-G-A-T-C-A-T-T 3' Using the genetic code provided, list the amino acid sequence at the end of translation. Show how you got your answer.When nitrogenous bases in single-stranded polynucleotides are incorporated into doublestranded molecules, base pair formation results in altered UV light absorption. This is called the _____________ effect