DNA and RNA Structure

Question 1

Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.

Revolt · Accepted Answer

Rosalind Franklin's X-ray diffraction image (Photo 51) provided evidence that DNA is shaped like a double helix. Her work showed that the sugar-phosphate backbone was on the outside and the nitrogenous bases were on the inside. She also provided precise measurements, such as the diameter of the helix and distance between bases, which Watson and Crick used to construct their accurate 3D model.

Question 2

What information did you include in your response? In 1952, Rosalind Franklin produced an image of DNA that suggested it contained two strands twisted in a double helix with a phosphate backbone and bases inside. Franklin calculated the diameter of DNA, the distance between strands and bases, the angle of the helix, and the number of bases per coil. Watson and Crick used this information to build and accurate model of DNA.

Revolt · Accepted Answer

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Question 3

Explain the roles of mRNA and tRNA in protein synthesis.

Revolt · Accepted Answer

mRNA is transcribed from DNA and carries the genetic code from the nucleus to the ribosome. The sequence of nucleotides in the mRNA identifies which amino acids should be linked together. tRNA then translates the mRNA sequence by carrying the corresponding amino acids to the ribosome to build the protein.

Question 4

Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.

Revolt · Accepted Answer

Rosalind Franklin's X-ray diffraction image (Photo 51) provided evidence that DNA is shaped like a double helix. Her work showed that the sugar-phosphate backbone was on the outside and the nitrogenous bases were on the inside. She also provided precise measurements, such as the diameter of the helix and distance between bases, which Watson and Crick used to construct their accurate 3D model.

Question 5

Explain the roles of mRNA and tRNA in protein synthesis.

Revolt · Accepted Answer

mRNA is transcribed from DNA and carries the genetic code from the nucleus to the ribosome. The sequence of nucleotides in the mRNA identifies which amino acids should be linked together. tRNA then translates the mRNA sequence by carrying the corresponding amino acids to the ribosome to build the protein.

Question 6

What information did you include in your response? Check all that apply.

Revolt · Accepted Answer

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Question 7

What information did you include in your response?

Revolt · Accepted Answer

A: In 1952, Rosalind Franklin produced an image of DNA that suggested it contained two strands twisted in a double helix with a phosphate backbone and bases inside.; B: Franklin calculated the diameter of DNA, the distance between strands and bases, the angle of the helix, and the number of bases per coil.; C: Watson and Crick used this information to build and accurate model of DNA.

DNA and RNA Structure Answers

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