PART IV. MOLECULAR BIOLOGY (DNA/PROTEIN SEQUENCES) Scientists use DNA/protein sequences to figure out which organisms are most closely related to each other. Cytochrome c is a protein found in mitochondria used in the study of evolutionary relationships among organisms. DIRECTIONS: Study the table below that shows the amino acid sequences for cytochrome c in several organisms. Compare the human amino acid sequence to the other species. Then, for each non-human organism, circle any amino acids different from the human amino acid sequence. Record how many differences you found in the table and answer the questions that follow. Organism Human Biochemical Data le Asp Lys Glu Ala Lys Asp Lys Ser Val Asp Glu Lys Gly Glu Lys Glu Lys Thr Glu Lys Thr Gly Ala Lys Glu Lys Gly Ala Lys Asp Lys Glu Ala Lys Glu Ala Pro Tyr Ser Ala Glu Chicken Pig Horse Dog Ala Glu Phe Ser Asp Thr Glu Ala Pro Phe Ser Asp Thr Ala Pro Phe The Asp Thr Ala Pro Phe Ser Asp Thr Glu Glu Glu Glu Ala Val Phe Ala Pro TyT Ser Ala Thr Whale Ser Asp Thr Monkey Glu Dog Organism Total Number of Amino Acids Different from Human Cytochrome e Chicken Pig Horse Whale Monkey UCATIO
PART IV. MOLECULAR BIOLOGY (DNA/PROTEIN SEQUENCES) Scientists use DNA/protein sequences to figure out which organisms are most closely related to each other. Cytochrome c is a protein found in mitochondria used in the study of evolutionary relationships among organisms. DIRECTIONS: Study the table below that shows the amino acid sequences for cytochrome c in several organisms. Compare the human amino acid sequence to the other species. Then, for each non-human organism, circle any amino acids different from the human amino acid sequence. Record how many differences you found in the table and answer the questions that follow. Organism Human Biochemical Data le Asp Lys Glu Ala Lys Asp Lys Ser Val Asp Glu Lys Gly Glu Lys Glu Lys Thr Glu Lys Thr Gly Ala Lys Glu Lys Gly Ala Lys Asp Lys Glu Ala Lys Glu Ala Pro Tyr Ser Ala Glu Chicken Pig Horse Dog Ala Glu Phe Ser Asp Thr Glu Ala Pro Phe Ser Asp Thr Ala Pro Phe The Asp Thr Ala Pro Phe Ser Asp Thr Glu Glu Glu Glu Ala Val Phe Ala Pro TyT Ser Ala Thr Whale Ser Asp Thr Monkey Glu Dog Organism Total Number of Amino Acids Different from Human Cytochrome e Chicken Pig Horse Whale Monkey UCATIO
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:PART IV. MOLECULAR BIOLOGY (DNA/PROTEIN SEQUENCES)
Scientists use DNA/protein sequences to figure out which organisms are most closely related
to each other. Cytochrome c is a protein found in mitochondria used in the study of
evolutionary relationships among organisms.
DIRECTIONS: Study the table below that shows the amino acid sequences for cytochrome c
in several organisms. Compare the human amino acid sequence to the other species. Then,
for each non-human organism, circde any amino acids different from the human amino acid
sequence. Record how many differences you found in the table and answer the questions that
follow.
Organism
Biochemical Data
Ala Pro Tyr Ser
lle Asp Lys Glu Ala Lys
Val Asp
Gly Glu Lys
Glu Lys
Human
Glu
Ala
Glu Phe Ser Asp Thr Asp Lys Ser
Chicken
Pig
Glu
Ala
Thr Glu Lys
Glu Lys
Ala Pro Phe Ser Asp
Thr Asp| Thr
Pro Phe Ser Asp Thr
Phe Ser Asp
Thr
Glu
Horse
Glu
Ala
Pro
Phe
Thr
Dog
Whale
Gly Ala
Lys
Glu Lys Gly Ala
Lys
Lys
Glu
Ala
Glu
Thr
Glu
Ala
Val
Thr
Monkey
Glu
Ala
Pro
Tyr
Ser
Ala
Asp
Lys
Glu
Ala
Organism
Total Number of
Amino Acids Different
from Human
Chicken
Pig
Horse
Dog
Whale Monkey
Cytochrome e
1. Which organism seems to be the most closely related to humans?
2. Why do you think this organism is most closely related to humans?
NCR Un
3. Based on your answers from the table, are there any organisms having the same number
of differences from human Cytochrome c? In this case, how would you conclude which
organism is most dosely related to humans?
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