Podcast
Questions and Answers
Which scientist published the double helical model of the DNA structure in 1953?
Which scientist published the double helical model of the DNA structure in 1953?
- Hershey & Chase
- Erwin Chargaff
- Watson & Crick (correct)
- Phage T2
What is the main reason protein is considered rich in nitrogen?
What is the main reason protein is considered rich in nitrogen?
- High nitrogen content (correct)
- Low hydrogen content
- High phosphorus content
- Low sulfur content
What is the function of a nucleoside in DNA?
What is the function of a nucleoside in DNA?
- Initiate protein synthesis
- Form sugar-phosphate backbone
- Provide energy for cellular processes
- Carry genetic information (correct)
What was the organism used in the Hershey-Chase experiment to study DNA replication?
What was the organism used in the Hershey-Chase experiment to study DNA replication?
What did Erwin Chargaff's research reveal about DNA bases?
What did Erwin Chargaff's research reveal about DNA bases?
What was the transforming material identified as in the 1944 experiment conducted by Oswald Avery, Colin MacLeod, and Maclyn McCarty?
What was the transforming material identified as in the 1944 experiment conducted by Oswald Avery, Colin MacLeod, and Maclyn McCarty?
Which analytical tool was used to determine the high molecular weight of the transforming material?
Which analytical tool was used to determine the high molecular weight of the transforming material?
What characteristic of DNA helped differentiate it from proteins in the experiment?
What characteristic of DNA helped differentiate it from proteins in the experiment?
Which wavelength of light absorption is most strongly associated with DNA?
Which wavelength of light absorption is most strongly associated with DNA?
What did the average nitrogen/phosphorus ratio of 1.67 suggest about the transforming material?
What did the average nitrogen/phosphorus ratio of 1.67 suggest about the transforming material?
Which analytical tool was used to match the absorption spectrum of the transforming material to that of DNA?
Which analytical tool was used to match the absorption spectrum of the transforming material to that of DNA?
Which technique did Maurice Wilkins and Rosalind Franklin use to analyze the three-dimensional structure of DNA?
Which technique did Maurice Wilkins and Rosalind Franklin use to analyze the three-dimensional structure of DNA?
What does the arrangement of spots in an X-shape in X-ray diffraction analysis of DNA indicate?
What does the arrangement of spots in an X-shape in X-ray diffraction analysis of DNA indicate?
Why is DNA considered simple when analyzed using X-ray diffraction?
Why is DNA considered simple when analyzed using X-ray diffraction?
According to Crick and Watson, why are purines paired with pyrimidines in DNA?
According to Crick and Watson, why are purines paired with pyrimidines in DNA?
What is the significance of the spacing between adjacent spots in the X-ray diffraction pattern of DNA?
What is the significance of the spacing between adjacent spots in the X-ray diffraction pattern of DNA?
How did Rosalind Franklin's X-ray results contribute to understanding DNA?
How did Rosalind Franklin's X-ray results contribute to understanding DNA?
Which of the following nitrogenous bases is found in DNA but not in RNA?
Which of the following nitrogenous bases is found in DNA but not in RNA?
What is the major structural difference between ribose and deoxyribose sugars?
What is the major structural difference between ribose and deoxyribose sugars?
Which of the following statements is true about nucleotides?
Which of the following statements is true about nucleotides?
What structural feature gives nucleotide chains polarity?
What structural feature gives nucleotide chains polarity?
Which scientist was known for discovering the Chargaff's rules for DNA base pairing?
Which scientist was known for discovering the Chargaff's rules for DNA base pairing?
What does Chargaff's rule regarding DNA structure state?
What does Chargaff's rule regarding DNA structure state?
What is the correct number of hydrogen bonds between adenine and thymine in DNA?
What is the correct number of hydrogen bonds between adenine and thymine in DNA?
What type of bonding occurs between guanine and cytosine in DNA?
What type of bonding occurs between guanine and cytosine in DNA?
What is the distance between base pairs in the DNA molecule?
What is the distance between base pairs in the DNA molecule?
How many base pairs are there approximately per turn of the DNA helix?
How many base pairs are there approximately per turn of the DNA helix?
What is the approximate diameter of the DNA molecule?
What is the approximate diameter of the DNA molecule?
In DNA, why must one strand have a 5'-3' polarity if the other has a 3'-5’ polarity?
In DNA, why must one strand have a 5'-3' polarity if the other has a 3'-5’ polarity?
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