18 Questions
What is the specific base pairing rule between Adenine (A) and Thymine (T)?
Adenine pairs with Thymine
What is the approximate composition of chromatin in terms of histone proteins?
30%
Which protein forms frameworks that guide DNA strands in the nucleus?
Scaffold proteins
Which protein is known as the anchor protein that helps in DNA looping?
CTCF protein
What is the role of RNA in the context of genes and proteins?
To act as a bridge between genes and proteins
What is the term used to describe DNA coiled around a histone protein?
Nucleosome
Who deciphered 'photo 51' of the B-form of DNA?
James Watson
Which biochemist identified 5-carbon sugar ribose and deoxyribose?
Phoebus Levene
Who discovered that the three equal parts of a nucleotide are found in equal proportions?
Erwin Chargaff
Which scientist distinguished two forms of DNA using X-ray diffraction?
Rosalind Franklin
What regular relationship was observed by Erwin Chargaff regarding base compositions in DNA?
A + G = T + C
Which scientist made cardboard cut-outs of A, T, C, and G bases in DNA modeling?
Francis Crick
Which nitrogenous base in DNA is a purine?
Guanine
What type of bond forms between the deoxyribose sugars and the phosphates in DNA?
Phosphodiester bond
In DNA, what does the 5' carbon attach to?
3' carbon of the next nucleotide
Which of the following is NOT a component of a nucleotide?
Hydrogen bond
What is the specific pairing mode between purines and pyrimidines in DNA?
Hydrogen bonding
Why is DNA structure described as antiparallel?
Because the two chains run in opposite directions
Test your knowledge on DNA nucleotides which are composed of deoxyribose sugar, phosphate group, and nitrogenous bases like purines (Guanine, Adenine) and pyrimidines (Cytosine, Thymine). Understand the basic building blocks of DNA!
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