In the muscle, when are glycolysis and the citric acid cycle both active and when are they both turned off?(2 points) When is only glycolysis active and when is only the citric acid cycle active?(2 points) Why? (2 points)
In: Biology
Which of the following statements about hemoglobin is false?
| a. |
hemoglobin is a very large protein composed of four large protein subunits |
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| b. |
there are two alpha (α) and two beta (β) subunits in each hemoglobin molecule |
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| c. |
each alpha and beta subunit includes a heme group |
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| d. |
oxygen (O2) molecules bind irreversibly to an iron ion (Fe++) in a heme group |
Which of the following statements about oxygen delivery to the body tissues is false?
| a. |
low oxygen concentration in the body tissues enhances the unbinding of oxygen (O2) from hemoglobin |
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| b. |
hemoglobin usually loses all four oxygens (O2) when they unbind in the tissues |
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| c. |
body tissues have greater acidity (higher hydrogen ion (H+) concentration (lower pH) than the lungs |
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| d. |
higher acidity (higher hydrogen ion (H+) causes hemoglobin to release more oxygen (O2 |
Digestion is necessary because…
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large biomolecules cannot pass through cell membranes |
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the absorption of food requires energy (is endergonic) |
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only monomers are absorbed through the lining of the small intestine |
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all except choice (b) are correct |
Which of the following is not a type of biomolecule that must be digested before it can be absorbed?
| a. |
long-chain carbohydrate molecules |
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| b. |
protein molecules |
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| c. |
nucleic acid molecules |
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| d. |
water-soluble vitamins |
Which of the following is not a function of human blood?
| a. |
blood transports oxygen and nutrients to all body cells |
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| b. |
blood transports carbon dioxide and other metabolic wastes from cells |
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| c. |
blood helps maintain the body’s internal pH and water concentration |
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| d. |
blood exchanges gases with the atmosphere primarily through the skin |
Which of the following statements about human blood is false?
| a. |
blood plasma makes up more than half of the volume of normal blood |
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| b. |
blood plasma is mostly water, with dissolved ions, amino acids, glucose, hormones, proteins, and other materials |
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| c. |
white blood cells (leukocytes) make up about 40% of the volume of normal blood |
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| d. |
red blood cells (erythrocytes) are the most common blood cells |
In: Anatomy and Physiology
Which enzyme unwinds?
Which enzyme prevents supercoiling?
Which enzyme lays down RNA?
Which enzyme replaces the primer?
Which enzyme connects Okazaki fragments?
In: Biology
Your firm is considering leasing a $ 51000 copier. The copier has an estimated economic life of eight years. Suppose the appropriate discount rate is 9.1 % APR with monthly compounding. Classify each lease below as a capital lease or operating lease, and explain why:
a. A four-year fair market value lease with payments of $ 1145 per month.
b. A six-year fair market value lease with payments of $ 800 per month.
c. A five-year fair market value lease with payments of $ 920 per month.
d. A five-year fair market value lease with payments of $ 1010 per month and an option to cancel after three years with a$ 9400 cancellation penalty.
In: Finance
please answer all or explain.
11. Circle the statement that is not true for hemoglobin.
A.The R-state has a high affinity for diatomic oxygen.
B. 2,3-bisphosphoglycerate stabilizes the T-state.
C. Carbon monoxide stabilizes the R-state.
D. H+ ions stabilize the R-state.
12. Circle the statement that is not true for CO2.
A. It is a non-polar molecule that can diffuse across cell membranes.
B. It can combine with terminal amines on proteins to form carbamates.
C. It is primarily transported in the blood as HCO3.
D. It inhibits the release of O2 from hemoglobin.
13. What environmental pressure is considered responsible for keeping the sickle cell gene in the human gene pool?
14. Circle the statement that is not true for an enzyme.
A. It reduces ΔG for a reaction.
B. It stabilizes the transition state in a reaction.
C. It increases the reaction rate in both the forward and reverse directions.
D. It has a catalytic site that is a crevice or cleft in the molecule.
15. What are the two types of cofactors that interact with enzyme? (8 points)
In: Chemistry
As illustrated in your text, identify two ways that Raphael's Madonna of the Meadow is similar to da Vinci's Madonna of the Rocks in style and/or composition, and two ways that it is different.
In: Psychology
In Mediterranean countries, it is traditionally recommended to drink a glass of olive oil per day to stay healthy. Consider that olive oil is made of 100% of triglycerides. Among the fatty acids contained in these triglycerides, 70% are oleic acid (monounsaturated fatty acid with 18 carbons), 10% are linoleic acid (polyunsaturated fatty acid (2 unsaturations) with 18 carbons) and linolenic acid (polyunsaturated fatty acid (3 unsaturations) with 18 carbons), 10% are palmitic acid (saturated fatty acid with 16 carbons), and 10% are stearic acid (saturated fatty acid with 18 carbons).
B. Explain how these triglycerides are digested in the intestine.
C.Explain how these lipids are distributed to peripheral tissues (explain in detail how these lipids are transported from the intestine to the peripheral tissues (or extra-hepatic tissues) : how they are transported in the bloodstream and how they are distributed to the peripheral tissues)
D. Explain the different fates of these fatty acids in the post-prandial period in the following organs: a) skeletal muscles, b) adipose tissue and c) the brain. For each metabolic pathway involved, name the pathway, give the initial substrate(s) and the final product(s) and the ultimate goal of each pathway (please do not describe the whole pathway!). Then, describe the limiting step(s) of each pathway: give the substrate and the product of each limiting reaction and the name of the enzyme that catalyzes each limiting reaction. Finally, briefly explain how these pathways are regulated during the post-prandial period. (13.5 marks)
In: Anatomy and Physiology
Glycolysis
1. How are reducing equivalents from NADH generated in glycolysis in the cytoplasm transported into the mitochondrion resulting in the formation of NADH within the inner mitochondrial membrane?
Thank you, I'm having trouble locating this answer in my notes/text book
In: Biology
Pick a profession that you might be interested in that demands some knowledge in the life sciences. From the abbreviate course outline provided below, choose the 5 units you think are most important, then explain what you must learn in detail to give you the best academic preparation for your profession. Be sure to relate to specific concepts learned within each unit of your chosen units. Must be at least 500 words.
Animal Physiology; review major animal phyla; vertebrate reproduction, embryology and hormone regulation; circulation, digestion and exchange systems; excretion and kidney nephrons; the vertebrate immune system; neurons and nervous systems
Carbon and the Macromolecules of Living Things; structure and function of carbon, carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics.
Ecology; ecosystems, biomes, cycles of materials, communities, succession, populations.
Cell Structure, Function, and Division; cell theory, structure and function of organelles, membrane transport, cell to cell interactions, mitosis, carcinogenesis.
Respiration and Photosynthesis; ATP, fundamentals of metabolism, energy from nutrients, anaerobic and aerobic respiration, how plants convert solar energy to chemical energy.
Mendelian Genetics; meiosis, laws of heredity, punnett squares, human traits, genetic disorders, chromosomal abnormalities.
Molecular Genetics; DNA function, structure, and replication; RNA transcription and translation; gene regulation; genetic engineering.
Classification and Evolution; taxonomy, species defined, classic darwinism, mechanisms of evolution, fossil formation and dating, the evolution of self replicating molecules through vertebrates and humans, how species evolve, and a genetic view of evolution.
Organism Survey (primarily microorganisms); viruses, bacteria, protists, and fungi.
Botany; classification of plants, basic structure and function of tissues, and physiology.
In: Biology
Pick a profession that you might be interested in that demands some knowledge in the life sciences. From the abbreviate course outline provided below, choose the 5 units you think are most important, then explain what you must learn in detail to give you the best academic preparation for your profession. Be sure to relate to specific concepts learned within each unit of your chosen units. Must be at least 500 words.
Animal Physiology; review major animal phyla; vertebrate reproduction, embryology and hormone regulation; circulation, digestion and exchange systems; excretion and kidney nephrons; the vertebrate immune system; neurons and nervous systems
Carbon and the Macromolecules of Living Things; structure and function of carbon, carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics.
Ecology; ecosystems, biomes, cycles of materials, communities, succession, populations.
Cell Structure, Function, and Division; cell theory, structure and function of organelles, membrane transport, cell to cell interactions, mitosis, carcinogenesis.
Respiration and Photosynthesis; ATP, fundamentals of metabolism, energy from nutrients, anaerobic and aerobic respiration, how plants convert solar energy to chemical energy.
Mendelian Genetics; meiosis, laws of heredity, punnett squares, human traits, genetic disorders, chromosomal abnormalities.
Molecular Genetics; DNA function, structure, and replication; RNA transcription and translation; gene regulation; genetic engineering.
Classification and Evolution; taxonomy, species defined, classic darwinism, mechanisms of evolution, fossil formation and dating, the evolution of self replicating molecules through vertebrates and humans, how species evolve, and a genetic view of evolution.
Organism Survey (primarily microorganisms); viruses, bacteria, protists, and fungi.
Botany; classification of plants, basic structure and function of tissues, and physiology.
In: Biology