CUSTOM BIOLOGY
19th Edition
ISBN: 9781323945490
Author: Urry
Publisher: Pearson Custom Publishing
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Chapter 8.4, Problem 4CC
Summary Introduction
To draw: A graph depicting the
Introduction: Lysosomes are the enzymes that are present in the cytoplasm and are used in breaking down of molecules such as carbohydrates. It also digests foreign agents during phagocytosis mechanism in many cellular organisms. It is also released during apoptotic reactions.
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Human lysozyme is an enzyme active in lysosomes. At approximately what pH would you expect this enzyme to display maximal activity?
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enzyme activity should be reasonably similar at all of these pH values
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7
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The cell membrane is both fluid and asymmetrical. Discuss asymmetry of the plasma membrane, as well as the enzyme involved. Explain properties that contribute to the fluidity of the cell membrane?
How many copies of a protein need to be present
in a cell in order for it to be visible as a band on an SDS gel? Assume that you can load 100 µg of cell extract onto a gel and that you can detect 10 ng in a single band by sil ver staining the gel. The concentration of protein in cells is about 200 mg/mL, and a typical mammalian cell has a volume of about 1000 μm³ and a typical bacterium a vol ume of about 1 µm³. Given these parameters, calculate the number of copies of a 120-kd protein that would need to be present in a mammalian cell and in a bacterium in order to give a detectable band on a gel. You might try an order-of-magnitude guess before you make the calcula tions.
Chapter 8 Solutions
CUSTOM BIOLOGY
Ch. 8.1 - Prob. 1CCCh. 8.1 - Describe the forms of energy found in an apple as...Ch. 8.1 - WHAT IF? If you place a teaspoon of sugar in the...Ch. 8.2 - Cellular respiration uses glucose and oxygen,...Ch. 8.2 - VISUAL SKILLS How would the processes of...Ch. 8.2 - Prob. 3CCCh. 8.3 - How does ATP typically transfer energy from an...Ch. 8.3 - Prob. 2CCCh. 8.3 - MAKE CONNECTIONS Does Figure 8.11a show passive...Ch. 8.4 - Many spontaneous reactions occur very slowly. Why...
Ch. 8.4 - Prob. 2CCCh. 8.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 8.4 - Prob. 4CCCh. 8.5 - How do an activator and an inhibitor have...Ch. 8.5 - Prob. 2CCCh. 8 - Explain how the highly ordered structure of a cell...Ch. 8 - Explain the meaning of each component in the...Ch. 8 - Describe the ATP cycle: How is ATP used and...Ch. 8 - How do both activation energy barriers and enzymes...Ch. 8 - Prob. 8.5CRCh. 8 - Choose the pair of terms that correctly completes...Ch. 8 - Prob. 2TYUCh. 8 - Which of the following metabolic processes can...Ch. 8 - Prob. 4TYUCh. 8 - Some bacteria art metabolically active in hot...Ch. 8 - If an enzyme is added to a solution where its...Ch. 8 - Prob. 7TYUCh. 8 - EVOLUTION CONNECTION Some people argue that...Ch. 8 - Prob. 9TYUCh. 8 - WRITE ABOUT A THEME: ENERGY AND MATTER Life...Ch. 8 - Prob. 11TYU
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- Onion Cell Plasmolysis For comparison, the following picture is of onion cells in pure water. Identify the structures listed below. A. B. K C. D. Identify the structure labeled A (thick line Identify the structure labeled B ✓ [Choose ] Cell membrane Nucleus Cytoplasm Cell wall Identify the structure labeled C [Choose ] Identify the structure labeled D (thin line [Choose ] between the white and purple))arrow_forwardplease help with both questionsarrow_forwardTime le The net negative charge of the heteropolysaccharide chain in proteoglycans causes: Select one: a. Secretion of proteoglycans to extracellular matrix. b. The "slippery" nature of mucus. O c. Targeting of proteoglycans to lysosomes for degradation O d. Specific attachment of the sugar chains to serine residue Clear my choice One of the following functions is not of Nitric Oxide: Select one: a. mediates muscular contractions O b. prevents platelets formation O c. mediates bactericidal actions of macrophages O d. function as neurotransmitter Clear my choicearrow_forward
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