A primitive eukaryote was discovered that displayed a uniquenucleic acid as its genetic material. Analysis revealed the followingobservations:(a) X-ray diffraction studies display a general pattern similarto DNA, but with somewhat different dimensions and moreirregularity. (b) A major hyperchromic shift is evident upon heating andmonitoring UV absorption at 260 nm.(c) Base-composition analysis reveals four bases in the followingproportions:Adenine = 8% Hypoxanthine = 18%Guanine = 37% Xanthine = 37%(d) About 75 percent of the sugars are deoxyribose, whereas25 percent are ribose.Attempt to solve the structure of this molecule by postulating amodel that is consistent with the foregoing observations.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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A primitive eukaryote was discovered that displayed a unique
nucleic acid as its genetic material. Analysis revealed the following
observations:
(a) X-ray diffraction studies display a general pattern similar
to DNA, but with somewhat different dimensions and more
irregularity.

(b) A major hyperchromic shift is evident upon heating and
monitoring UV absorption at 260 nm.
(c) Base-composition analysis reveals four bases in the following
proportions:
Adenine = 8% Hypoxanthine = 18%
Guanine = 37% Xanthine = 37%
(d) About 75 percent of the sugars are deoxyribose, whereas
25 percent are ribose.
Attempt to solve the structure of this molecule by postulating a
model that is consistent with the foregoing observations.

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