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Question #1: Choanoflagelletes are a unicellular ancestor to animals. One observation to support this hypothesis is the appearance of adhesion molecules that are key to the development of multiceullarity. Bulk transport- Gap junctions Insects, mammals, and other animals with bilateral symmetry (~10,000,000) Jellyfish and their relatives (10,000) Sponges (10,000) Choanoflagellates (150) Despite their simple unicellular lifestyle they express adhesion molecules including cadherins and lectins (King et al., 2003) but don't seem to have molecules that are typically found in the extracellular matrix such as integrins or laminins (Williams et al., 2014). Design a microscopy experiment to test the assertion that choanoflagellates have (some) adhesion molecules and those molecules play a similar role in a closely related animal like sponges. Animals Adhesion, cell. signaling Single-celled

Question #1: Choanoflagelletes are a unicellular ancestor to animals. One observation to support this hypothesis is the appearance of adhesion molecules that are key to the development of multiceullarity. Bulk transport- Gap junctions Insects, mammals, and other animals with bilateral symmetry (~10,000,000) Jellyfish and their relatives (10,000) Sponges (10,000) Choanoflagellates (150) Despite their simple unicellular lifestyle they express adhesion molecules including cadherins and lectins (King et al., 2003) but don't seem to have molecules that are typically found in the extracellular matrix such as integrins or laminins (Williams et al., 2014). Design a microscopy experiment to test the assertion that choanoflagellates have (some) adhesion molecules and those molecules play a similar role in a closely related animal like sponges. Animals Adhesion, cell. signaling Single-celled

Human Anatomy & Physiology (11th Edition)
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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Question #1: Choanoflagelletes are a unicellular ancestor to animals. One observation to support this hypothesis is the appearance of adhesion molecules that are key to the development of multiceullarity. Bulk transport Gap junctions Animals. Adhesion, cell signaling Single-celled :} Insects, mammals, and other animals with bilateral symmetry (~10,000,000) Jellyfish and their relatives (10,000) } Sponges (10,000) Choanoflagellates (150) Despite their simple unicellular lifestyle they express adhesion molecules including cadherins and lectins (King et al., 2003) but don't seem to have molecules that are typically found in the extracellular matrix such as integrins or laminins (Williams et al., 2014). Design a microscopy experiment to test the assertion that choanoflagellates have (some) adhesion molecules and those molecules play a similar role in a closely related animal like sponges.
Transcribed Image Text:Question #1: Choanoflagelletes are a unicellular ancestor to animals. One observation to support this hypothesis is the appearance of adhesion molecules that are key to the development of multiceullarity. Bulk transport Gap junctions Animals. Adhesion, cell signaling Single-celled :} Insects, mammals, and other animals with bilateral symmetry (~10,000,000) Jellyfish and their relatives (10,000) } Sponges (10,000) Choanoflagellates (150) Despite their simple unicellular lifestyle they express adhesion molecules including cadherins and lectins (King et al., 2003) but don't seem to have molecules that are typically found in the extracellular matrix such as integrins or laminins (Williams et al., 2014). Design a microscopy experiment to test the assertion that choanoflagellates have (some) adhesion molecules and those molecules play a similar role in a closely related animal like sponges.
Rate of product formation Maximum speed of reaction Catalyzed reaction Uncatalyzed reaction Substrate concentration In the figure above, we can see that there are differences between the rates of chemical reactions with (red), and without (blue) the assistance of enzymes. While the rate of catalysis increases linearly with the addition of more substrate for the non-enzymatic reaction, we see that there is a limit to the speed of the reaction when an enzyme is involved. Briefly describe the factors that contribute to the limited speed of the enzyme.
Transcribed Image Text:Rate of product formation Maximum speed of reaction Catalyzed reaction Uncatalyzed reaction Substrate concentration In the figure above, we can see that there are differences between the rates of chemical reactions with (red), and without (blue) the assistance of enzymes. While the rate of catalysis increases linearly with the addition of more substrate for the non-enzymatic reaction, we see that there is a limit to the speed of the reaction when an enzyme is involved. Briefly describe the factors that contribute to the limited speed of the enzyme.
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