In a DNA double helix the bases are held together by hydrogen bonds. These hydrogen bonds are _________
Answer: Non-covalent bonds
With respect to the importance of hydrogen bonding and DNA double helix stability, which of the following statements is false?
Answer: Decreases the entropy
Levene investigated and found that the nucleic acid is composed of poly-nucleotides and each nucleotide is composed of one base, a sugar molecule and a phosphate. This was performed on the genome of________________
A nucleoside is composed of
DNA is the genetic material in
Answer: in some viruses, prokaryotes and eukaryotes
Chromatin is composed of
Answer: Nucleic Acids And Protein
Adjacent nucleotides are joined by
Answer: Phosphodiester Bond
The type of sugar in DNA are
The length of DNA having 23 base pairs is
Which of the following statements is incorrect about t RNA species?
Answer: All t RNAs have between 10-20 nucleotides
When the B DNA is slightly dehydrated in the laboratory it takes on-
Which of the following nucleic acids has a left-handed helix?
Which of the following processes would not lead to disruption of the nucleosomal structure?
Choose the incorrect statement about histones
Answer: H1 histones are tightly bound to chromatin
Which of the following has the highest percentage of modified bases ?
Choose the incorrect statement about an RNA:
Answer: Instead of Uracil contains the ribonucleotides of thymine
An endonuclease is an enzyme that hydrolyzes:
Answer: A phosphodiester bond located in the interior of a polynucleotide
Which of the following RNAs contains both a 7-Methyl guanosine triphosphate cap and polyadenylate segment?
The first X-ray diffraction patterns of DNA were taken in 1938 by ___________
In early 1950s high quality X-ray diffraction photographs of DNA suggesting the DNA being double helix and composed of two nucleotide strands. Who took those photographs?
Answer: Rosalind Franklin and Maurice Wilkins