Legionella pneumophila b) virologist -- studies human immunodeficiency virus c) Microbial ecologist -- studies bacteria that degrade oil d) Microbial physiologist – studies fermentation of sourdough bread e) Molecular biologist – studies recombinant DNA 2) You are observing a cell through a microscope and note that it has not apparent nucleus. You conclude that it most likely a) has a peptidoglycan cell wall b) has a cellulose cell wall c) moves by pseudopods d) is part of a
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Chapter 1 Reading and Study Guide Why This Chapter Matters 1. We are living in the golden age of biology. Biological discoveries revolutionize medicine‚ change agriculture‚ and impact human culture. 2. Life is united not by a single trait‚ but by a common set of characteristics. Appreciating what it means to be living is as complex as life itself. 3. Life exists at many levels of biological organization. Understanding how these levels interrelate provides insight into the mechanisms of living systems
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| | | | | | Question 17 | 2 points | Save | | Antibiotics are effective because they target | | | | | | | | the cell wall of the bacterium | | | the cell wall of fungi | | | virus capsids | | | virus DNA or RNA | | | | | | Question 18 | 2 points | Save | | Which is NOT a characteristic of every virus? | | | | | | | | obligate parasite | | | nucleic acid core | | | a capsid | | | envelope | | | |
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Exam 1 Study Guide 1) What is biology? the scientific study of life 2) Which of the following is not a property of life? A) Populations of organisms are unable to change over time. B) Living things exhibit complex but ordered organization. C) Organisms respond to environmental stimuli. D) Organisms take in energy and use it to perform all of life’s activities. E) Organisms reproduce their own kind. 3) What are the two main processes that ecosystems depend upon? nutrient
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out of 2 points Which of the following statements about meiosis is true? Selected Answer: a. The chromosome number in the resulting cells is halved. Question 2 2 out of 2 points The mitotic spindle Selected Answer: e. is composed of two different types of microtubules. Question 3 2 out of 2 points A chromatid is Selected Answer: e. one-half of a newly replicated eukaryotic chromosome. Question 4 2 out of 2 points
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Chapter 01 A View of Life 1. Organisms belonging to the same _____ would be the most closely related. A. kingdom B. phylum C. family D. class E. order 2. A university biology department wishes to hire a scientist to work on the relationships among the wolves‚ moose‚ trees and physical features on an island. If you were charged with writing the job description‚ you should title the position A. population geneticist. B. molecular biologist. C. community ecologist. D. organismal physiologist
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Biological Science‚ 4e (Freeman) Chapter 1 Biology and the Tree of Life 1) Which of the following statements about cells is true? A cell is _____. A) only found in multiples of two‚ because single cells cannot exist independently B) always between 200 and 500 micrometers in diameter C) characteristic of eukaryotic but not prokaryotic organisms D) characteristic of both prokaryotic and eukaryotic organisms Answer: D Reference: Section 1.4 Bloom’s Taxonomy: Level 1 Knowledge 2)
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DNA is the biomolecule that provides the information for that organism. Which of the following statements about DNA is CORRECT? ……….. All cells in an organism have the same DNA‚ but differently expressed‚ providing specific cellular functions. Which of the following molecules is not found in RNA? ………… Thymine. Which of the following types of molecule would be most abundant in a typical animal cell? ‚‚……… Water. While studying the biochemistry of a species of plant found in alpine bogs‚ a biologist
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by mitosis. 2. Also‚ a phenomenon called crossing over occurs during prophase I of meiosis I when pieces of nonsister chromatids exchange places to promote new genetic combinations in the offspring. 3. Prior to meiosis I‚ during interphase‚ the DNA replicates and the cell readies itself for cell division. 4. Meiosis I consists of four stages: prophase I
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Extracting DNA from Wheat Germ Cells Criteria to be assessed CE Introduction: DNA is the abbreviation for deoxyribonucleic acid. DNA is found in the nucleus of every cell & it stores the information that makes up living organisms. It is a double helix of 4 nucleotides. It contains a code that allows the body to make up proteins. The nucleotides are Cytosine‚ Guanine‚ Adenine and Thymine. (1) Wheat germ comes from wheat seeds. The ’ germ ’ is the embryo‚ which is the part of
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