A DNA molecule rich in C-G base pairs will have less hydrogen bonds between its two strands compared to a DNA molecule rich in A-T base pairs. 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.A beginning genetics student is attempting to complete an assignment to draw a base pair from a DNA molecule. The drawing is incomplete, and the student does not know how to finish. He asks for your advice. The assignment sheet shows that the drawing is to contain three hydrogen bonds, a purine, and a pyrimidine. From your knowledge of the pairing rules and the number of hydrogen bonds in A/T and G/C base pairs, what base pair do you help the student draw?true or false: a nucleotide’s 5 end provides the energy to synthesize a new strand of DNA.
- true or false: DnaB acts as a helicase and unwinds strands 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.Which of the following statements are true about doublestranded DNA?a. A + C = T + Gb. A + G = C + Tc. A + T = G + Cd. A/G = C/Te. A/G = T/Cf. (C + A) / (G + T) = 1
- A strand of DNA contains the base pair 5’-T-C-A-G-C-A-T-3’. Give the base sequence onthe complementary DNA strand.If A represents 40% of the nucleotides in a particular piece of double stranded DNA, how often will the sequence GG appear? (You can say that GG would be expected to appear, on average, every _____ bases.) SHOW WORK!In 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.
- 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 FalseType the matching bases in each DNA sequence. G A T A G C T A G GThe two complementary strands of the DNA double helix are held to each other by (a) ionic bonds between deoxyribose molecules (b) ionic bonds between phosphate groups (c) covalent bonds between nucleotide bases (d) covalent bonds between deoxyribose molecules (e) hydrogen bondsbetween nucleotide bases
