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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Transcribed Image Text:a) What technique(s) can be used to determine the structure of the oxygen-
evolving complex as shown in A?
b) In the oxygen-evolving complex A, what type of bond connects Ca1
(Ca2+) and 01?
c) In photosynthesis, the oxygen-evolving complex A works as a water-
oxidizing agent which can produce O2 from H2O under sunlight. In this
process, does H20 act as a Lewis acid or Lewis base?
Transcribed Image Text:Evidence suggests that manganese (Mn) was first incorporated into
biological systems roughly 3.2-2.8 billion years ago. Together with calcium,
it formed the manganese-calcium oxide complex which consisted of a
manganese cluster. The incorporation of a manganese center in
photosystem II was highly significant, as it allowed for photosynthetic
oxygen evolution of plants. The oxygen-evolving complex (OEC) (shown in
A) is a critical component of photosystem II contained in the thylakoid
membranes of chloroplasts; it is responsible for terminal photooxidation of
water during light reactions. In the text box below, answer the following
questions (a-c).
W4
W3
D1-E189
D1-D170
Ca1
01 1
05
Mn1
D1-D342
W2
CP43-R357
Mn4
Mn2
03
05
D1-H332
Mn3
CP43-E354
Оз
D1-H337
D1-E333
A
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